Math Main Page => Exercises - Math III
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Goal: to practice how to make use of distributive property on special numbers, like (A + B) * (A - B) = A*A - B*B, A*C +B*C = (A + B ) *C, A*C - B*C = (A-B) * C
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Tuesday February 24 2026
07:18:20 AM | Tuesday February 24 2026
07:18:20 AMFlip Answers |
| 1) | 96 * 104 = | | 1) 100 * 100 - 4 * 4 = 9984 |
| 2) | 110 * 90 = | | 2) 100 * 100 - 10 * 10 = 9900 |
| 3) | 296 * 304 = | | 3) 300 * 300 - 4 * 4 = 89984 |
| 4) | 94 * 106 = | | 4) 100 * 100 - 6 * 6 = 9964 |
| 5) | 399 * 401 = | | 5) 400 * 400 - 1 * 1 = 159999 |
| 6) | 408 * 392 = | | 6) 400 * 400 - 8 * 8 = 159936 |
| 7) | 392 * 408 = | | 7) 400 * 400 - 8 * 8 = 159936 |
| 8) | 394 * 406 = | | 8) 400 * 400 - 6 * 6 = 159964 |
| 9) | 198 * 202 = | | 9) 200 * 200 - 2 * 2 = 39996 |
| 10) | 92 * 108 = | | 10) 100 * 100 - 8 * 8 = 9936 |
| 11) | 96 * 156 + 96 * 44 = | | 11) ( 156 + 44) * 96 = 19200 |
| 12) | 39 * 51 + 39 * 49 = | | 12) ( 49 + 51) * 39 = 3900 |
| 13) | 52 * 82 + 82 * 48 = | | 13) ( 52 + 48) * 82 = 8200 |
| 14) | 57 * 55 + 57 * 45 = | | 14) ( 55 + 45) * 57 = 5700 |
| 15) | 139 * 95 - 39 * 95 = | | 15) ( 139 - 39) * 95 = 9500 |
| 16) | 31 * 158 + 31 * 42 = | | 16) ( 158 + 42) * 31 = 6200 |
| 17) | 77 * 271 - 71 * 77 = | | 17) ( 271 - 71) * 77 = 15400 |
| 18) | 65 * 144 + 56 * 65 = | | 18) ( 144 + 56) * 65 = 13000 |
| 19) | 239 * 52 - 39 * 52 = | | 19) ( 239 - 39) * 52 = 10400 |
| 20) | 159 * 22 - 22 * 59 = | | 20) ( 159 - 59) * 22 = 2200 |
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Score: ______________ | |
