Maths Answers
Autumn Year 4
Week 1:
Placing numbers on a 0 – 1000 line (E + M)
450, 475, 925, 950
550, 575, 580, 595
340, 350, 360, 390
25, 225, 875, 975
Ordering and placing numbers on a 0 – 1000 line
a. 399, 501, 850, 975
b. 125, 340, 560, 949
c. 274, 279, 430, 895
Ordering and placing numbers on a 0 – 10,000 line (E + M)
2500, 5000, 6000, 7500
2000, 3000, 4000, 5000
5000, 5500, 6000, 6500
1000, 1250, 2500, 7500
Ordering and placing numbers on a 0 – 10,000 line
a. 3990, 5001, 8500, 9750
b. 1250, 3400, 5600, 9490
c. 2740, 2790, 4300, 8950
Week 2:
2-digit + 2-digit grid with missing totals
+ / 48 / 8024 / 72 / 104
57 / 105 / 137
2-digit + 2-digit grid with missing numbers
+ / 53 / 8025 / 78 / 105
62 / 115 / 142
Adding two 2-digit numbers
+ / 25 / 4020 / 45 / 60
32 / 57 / 72
+ / 35 / 45
22 / 57 / 67
53 / 88 / 98
+ / 28 / 58
23 / 51 / 81
32 / 60 / 90
+ / 75 / 46
27 / 102 / 73
31 / 106 / 77
+ / 70 / 85
36 / 106 / 121
24 / 94 / 109
+ / 89 / 96
27 / 116 / 123
39 / 128 / 135
Adding 3-digit and 2-digit numbers
Using the example numbers given:-
The biggest number possible: 742 + 51 = 793
An odd number, e.g. 524 + 17 = 541
An even number, e.g. 754 + 12 = 766
The smallest number possible: 147 + 25 = 172
A number with at least 1 digit repeated 2 times, e.g. 157 + 42 = 199
Counting up to subtract (E)
30 – 18 = 12
70 – 55 = 15
40 – 27 = 13
85 – 79 = 6
53 – 45 = 8
92 – 78 = 14
63 – 46 = 17
95 – 59 = 36
Counting up to subtract (MH)
33 – 18 = 15
72 – 55 = 17
53 – 27 = 26
65 – 36 = 29
81 – 45 = 36
74 – 39 = 35
95 – 76 = 19
67 – 38 = 29
Counting up or back to subtract
123 – 42 = 81
123 – 89 = 34
142 – 78 = 64
111 – 41 = 70
126 – 88 = 38
126 – 57 = 69
123 – 31 = 92
109 – 64 = 45
162 – 91 = 71
113 – 91 = 22
Week 3:
Adding 3-digit numbers using compact addition
A B C D
243 + 645 = 888 246 + 645 = 891 268 + 645 = 913 243 + 645 + 111 = 999
831 + 154 = 985 838 + 154 = 992 837 + 174 = 1011 631 + 154 + 213 = 998
755 + 321 = 1076 791 + 325 = 1116 755 + 386 = 1141 451 + 126 + 321 = 898
264 + 535 = 799 243 + 585 = 828 267 + 555 = 822 244 + 729 + 133 = 1106
426 + 453 = 879 426 + 456 = 882 466 + 456 = 922 327 + 115 + 453 = 895
Find a difference between a 3-digit number and a multiple of 100 (E)
400 - 359 = 41
400 - 372 = 28
400 - 395 = 5
400 - 384 = 16
400 - 362 = 38
400 - 378 = 22
400 - 391 = 9
400 - 385 = 15
400 - 363 = 37
Subtract pairs of 3-digit numbers (M)
407 – 359 = 48 413 – 359 = 54 404 – 359 = 45
407 – 372 = 35 413 – 372 = 41 404 – 372 = 32
407 – 395 = 12 413 – 395 = 18 404 – 395 = 9
407 – 384 = 23 413 – 384 = 29 404 – 384 = 20
407 – 362 = 45 413 – 362 = 51 404 – 362 = 42
407 – 378 = 29 413 – 378 = 35 404 – 378 = 26
407 – 391 = 16 413 – 391 = 22 404 – 391 = 13
407 – 385 = 22 413 – 385 = 28 404 – 385 = 19
407 – 363 = 44 413 – 363 = 50 404 – 363 = 41
405 – 359 = 46 406 – 359 = 47 403 – 359 = 44
405 – 372 = 33 406 – 372 = 34 403 – 372 = 31
405 – 395 = 10 406 – 395 = 11 403 – 395 = 8
405 – 384 = 21 406 – 384 = 22 403 – 384 = 19
405 – 362 = 43 406 – 362 = 44 403 – 362 = 41
405 – 378 = 27 406 – 378 = 28 403 – 378 = 25
405 – 391 = 14 406 – 391 = 15 403 – 391 = 12
405 – 385 = 20 406 – 385 = 21 403 – 385 = 18
405 – 363 = 42 406 – 363 = 43 403 – 363 = 40
412 – 359 = 53 409 – 359 = 50 415 – 359 = 56
412 – 372 = 40 409 – 372 = 37 415 – 372 = 43
412 – 395 = 17 409 – 395 = 14 415 – 395 = 20
412 – 384 = 28 409 – 384 = 25 415 – 384 = 31
412 – 362 = 50 409 – 362 = 47 415 – 362 = 53
412 – 378 = 34 409 – 378 = 31 415 – 378 = 37
412 – 391 = 21 409 – 391 = 18 415 – 391 = 24
412 – 385 = 27 409 – 385 = 24 415 – 385 = 30
412 – 363 = 49 409 – 363 = 46 415 – 363 = 52
Subtract pairs of 3-digit numbers
412 – 395 = 17 432 – 395 = 37 419 – 395 = 24
412 – 391 = 21 432 – 391 = 41 419 – 391 = 28
412 – 385 = 27 432 – 385 = 47 419 – 385 = 34
412 – 384 = 28 432 – 384 = 48 419 – 384 = 35
412 – 378 = 34 432 – 378 = 54 419 – 378 = 41
412 – 372 = 40 432 – 372 = 60 419 – 372 = 47
412 – 363 = 49 432 – 363 = 69 419 – 363 = 56
412 – 362 = 50 432 – 362 = 70 419 – 362 = 57
412 – 359 = 53 432 – 359 = 73 419 – 359 = 60
415 – 395 = 20 421 – 395 = 26 413 – 395 = 18
415 – 391 = 24 421 – 391 = 30 413 – 391 = 22
415 – 385 = 30 421 – 385 = 36 413 – 385 = 28
415 – 384 = 31 421 – 384 = 37 413 – 384 = 29
415 – 378 = 37 421 – 378 = 43 413 – 378 = 35
415 – 372 = 43 421 – 372 = 49 413 – 372 = 41
415 – 363 = 52 421 – 363 = 58 413 – 363 = 50
415 – 362 = 53 421 – 362 = 59 413 – 362 = 51
415 – 359 = 56 421 – 359 = 62 413 – 359 = 54
424 – 395 = 29 435 – 395 = 40 446 – 395 = 51
424 – 391 = 33 435 – 391 = 44 446 – 391 = 55
424 – 385 = 39 435 – 385 = 50 446 – 385 = 61
424 – 384 = 40 435 – 384 = 51 446 – 384 = 62
424 – 378 = 46 435 – 378 = 57 446 – 378 = 68
424 – 372 = 52 435 – 372 = 63 446 – 372 = 74
424 – 363 = 61 435 – 363 = 72 446 – 363 = 83
424 – 362 = 62 435 – 362 = 73 446 – 362 = 84
424 – 359 = 65 435 – 359 = 76 446 – 359 = 87
Using addition to check subtraction (E)
400 – 390 = 10
311 – 296 = 15
Using addition to check subtraction (M)
69 – 61 = 8
105 – 95 = 10
200 – 188 = 12
400 – 390 = 10
207 – 198 = 9
312 – 295 = 17
311 – 296 = 15
425 – 398 = 27
Week 4:
Skeletons
Triangular prism· 9 straws
· 6 blobs / Cube
· 12 straws
· 8 blobs / Cuboid
· 12 straws
· 8 blobs
Pentagonal prism
· 15 straws
· 10 blobs / Triangular based pyramid
· 6 straws
· 4 blobs / Square based pyramid
· 8 straws
· 5 blobs / Hexagonal prism
· 18 straws
· 12 blobs
Week 5:
Doubling and Halving 3-digit numbers:
Part A
122 x 2 = 244
242 x 2 = 484
353 x 2 = 706
464 ÷ 2 = 232
862 ÷ 2 = 431
666 ÷ 2 = 333
Part B
263 x 2 = 526
374 x 2 = 748
445 x 2 = 890
438 x 2 = 876
344 ÷ 2 = 172
452 ÷ 2 = 226
463 ÷ 2 = 231.5
674 ÷ 2 = 337
Part C
366 x 2 = 732
378 x 2 = 756
455 x 2 = 910
568 x 2 = 1136
718 x 2 = 1436
856 x 2 = 1712
853 ÷ 2 = 426.5
627 ÷ 2 = 313.5
975 ÷ 2 = 487.5
793 ÷ 2 = 396.5
579 ÷ 2 = 289.5
953 ÷ 2 = 476.5
Week 6:
Mystery additions and subtractions
4326 + 200 = 4526
7843 – 10 = 7833
4565 + 3 = 4568
8245 + 300 = 8545
9745 – 3000 = 6745
5832 – 400 = 5432
Place Value Mystery 1
7248 - 200 = 7048
Place Value Mystery 2
4501 + 70 = 4571
Place Value Mystery 3
5340 + 5 - 5000 = 345
Adding and subtracting 100 (10 and 1000)
4278 + 100 = 4378 2947 – 10 = 2937
6209 – 100 = 6109 4936 + 10 = 4946
7053 + 100 = 7153 8299 + 10 = 8309
3018 – 100 = 2918 3206 – 10 = 3196
1963 + 100 = 2063 4927 + 1000 = 5927
1100 – 100 = 1000 4820 – 1000 = 3820
7950 + 100 = 8050 3007 – 10 = 2997
2006 – 100 = 1906 4996 + 10 = 5006
4404 + 100 = 4504
3499 – 100 = 3399
Mystery number: 1010, 2020, 3030, 4040, 5050, 6060, 7070, 8080 or 9090
Week 7:
Adding and subtracting using place value and number facts
Section A
358 + 140 = 498
231 + 306 = 537
632 + 215 = 847
176 + 621 = 797
754 + 241 = 995
867 - 640 = 227
985 - 501 = 484
865 - 631 = 234
547 - 124 = 623
999 - 333 = 666
Section B
356 + 402 = 758 points
263 + 530 = 793 points
414 + 463 = 877 points
642 - 221 = 421 points
550 - 225 = 225 points
Leader board reads: Harry, Jake, Holly, Eve and then Sam
Subtracting single-digit numbers from a teens number
13 - 5 = 8
17 - 2 = 15
12 - 7 = 5
19 - 3 = 16
16 - 8 = 8
14 - 4 = 10
15 - 6 = 9
18 - 4 = 14
11 - 9 = 2
17 - 8 = 9
Adding Multiples and Multiples + 1
1. 156 + 20 = 176 156 + 21 = 177 5. 257 + 200 = 457 257 + 201 = 458
2. 347 + 40 = 387 347 + 39 = 386 6. 435 + 300 = 735 435 + 299 = 734
3. 661 + 30 = 691 661 + 31 = 692 7. 726 + 100 = 826 726 + 101 = 827
4. 346 + 100 = 446 346 + 99 = 445 8. 412 + 400 = 812 412 + 399 = 811
Adding Multiples of 10 and 100 and Multiples + 1, - 1
1. 156 + 20 = 176 156 + 19 = 175 156 + 21 = 177
2. 347 + 40 = 387 347 + 39 = 386 347 + 41 = 388
3. 661 + 30 = 691 661 + 29 = 690 661 + 31 = 692
4. 346 + 100 = 446 346 + 99 = 445 346 + 101 = 447
5. 257 + 200 = 457 257 + 199 = 456 257 + 201 = 458
6. 435 + 300 = 735 435 + 299 = 734 435 + 301 = 736
7. 726 + 100 = 826 726 + 99 = 825 726 + 101 = 827
8. 412 + 400 = 812 412 + 399 = 811 412 + 401 = 813
9. 189 + 30 = 219 189 + 29 = 218 189 + 31 = 220
10. 275 + 40 = 315 275 + 39 = 314 275 + 41 = 316
Subtracting multiples of 10/100 and multiples of 10/100 + 1, -1 (E)
596 - 40 = 556 768 - 40 = 728 556 - 40 = 516
596 - 41 = 555 768 - 41 = 727 556 - 41 = 515
596 - 500 = 96 768 - 500 = 268 556 - 500 = 56
596 - 501 = 95 768 - 501 = 267 556 - 501 = 55
596 - 20 = 576 768 - 20 = 748 556 - 20 = 536
596 - 19 = 577 768 - 19 = 749 556 - 19 = 537
596 - 300 = 296 768 - 300 = 468 556 - 300 = 256
596 - 301 = 295 768 - 301 = 467 556 - 301 = 255
689 - 40 = 649 999 - 40 = 959 759 - 40 = 719
689 - 41 = 648 999 - 41 = 958 759 - 41 = 718
689 - 500 = 189 999 - 500 = 499 759 - 500 = 259
689 - 501 = 188 999 - 501 = 498 759 - 501 = 258
689 - 20 = 669 999 - 20 = 979 759 - 20 = 739
689 - 19 = 670 999 - 19 = 980 759 - 19 = 740
689 - 300 = 389 999 - 300 = 699 759 - 300 = 459
689 - 301 = 388 999 - 301 = 698 759 - 301 = 458
Subtracting multiples of 10/100 and multiples of 10/100 + 1, -1 (M)
596 - 40 = 556 768 - 40 = 728 556 - 40 = 516
596 - 41 = 555 768 - 41 = 727 556 - 41 = 515
596 - 39 = 557 768 - 39 = 729 556 - 39 = 517
596 - 500 = 96 768 - 500 = 268 556 - 500 = 56
596 - 501 = 95 768 - 501 = 267 556 - 501 = 55
596 - 499 = 97 768 - 499 = 269 556 - 499 = 57
596 - 20 = 576 768 - 20 = 748 556 - 20 = 536
596 - 21 = 575 768 - 21 = 747 556 - 21 = 535
596 - 19 = 577 768 - 19 = 749 556 - 19 = 537
596 - 300 = 296 768 - 300 = 468 556 - 300 = 256
596 - 301 = 295 768 - 301 = 467 556 - 301 = 255
596 - 299 = 297 768 - 299 = 469 556 - 299 = 257
689 - 40 = 649 999 - 40 = 959 759 - 40 = 719
689 - 41 = 648 999 - 41 = 958 759 - 41 = 718
689 - 39 = 650 999 - 39 = 960 759 - 39 = 720
689 - 500 = 189 999 - 500 = 499 759 - 500 = 259
689 - 501 = 188 999 - 501 = 498 759 - 501 = 258
689 - 499 = 190 999 - 499 = 500 759 – 499 = 260
689 - 20 = 669 999 - 20 = 979 759 - 20 = 739
689 - 21 = 668 999 - 21 = 978 759 - 21 = 738
689 - 19 = 670 999 - 19 = 980 759 - 19 = 740
689 - 300 = 389 999 - 300 = 699 759 - 300 = 459
689 - 301 = 388 999 - 301 = 698 759 - 301 = 458
689 - 299 = 390 999 - 299 = 700 759 - 299 = 460
Subtracting multiples of 10/100 and multiples of 10/100 + 1, -1 (H)
596 - 40 = 556 739 - 40 = 699 511 - 40 = 471
596 - 41 = 555 739 - 41 = 698 511 - 41 = 470
596 - 39 = 557 739 - 39 = 700 511 - 39 = 472
596 - 500 = 96 739 - 500 = 239 511 - 500 = 11
596 - 501 = 95 739 - 501 = 238 511 - 501 = 10
596 - 499 = 97 739 - 499 = 240 511 - 499 = 12
596 - 20 = 576 739 - 20 = 719 511 - 20 = 491
596 - 21 = 575 739 - 21 = 718 511 - 21 = 490
596 - 19 = 577 739 - 19 = 720 511 - 19 = 492
596 - 300 = 296 739 - 300 = 439 511 - 300 = 211
596 - 301 = 295 739 - 301 = 438 511 - 301 = 210
596 - 299 = 297 739 - 299 = 440 511 - 299 = 212
619 - 40 = 579 556 - 40 = 516 728 - 40 = 688
619 - 41 = 578 556 - 41 = 515 728 - 41 = 687
619 - 39 = 580 556 - 39 = 517 728 - 39 = 689
619 - 500 = 119 556 - 500 = 56 728 - 500 = 228
619 - 501 = 118 556 - 501 = 55 728 - 501 = 227
619 - 499 = 120 556 - 499 = 57 728 – 499 = 229
619 - 20 = 599 556 - 20 = 536 728 - 20 = 708
619 - 21 = 598 556 - 21 = 535 728 - 21 = 707
619 - 19 = 600 556 - 19 = 537 728 - 19 = 709
619 - 300 = 319 556 - 300 = 356 728 - 300 = 428
619 - 301 = 318 556 - 301 = 355 728 - 301 = 427
619 - 299 = 320 556 - 299 = 357 728 - 299 = 429