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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Wednesday March 25 2026
10:48:31 AM | Wednesday March 25 2026
10:48:31 AMFlip Answers |
| 1) | 106 * 94 = | | 1) 100 * 100 - 6 * 6 = 9964 |
| 2) | 92 * 108 = | | 2) 100 * 100 - 8 * 8 = 9936 |
| 3) | 306 * 294 = | | 3) 300 * 300 - 6 * 6 = 89964 |
| 4) | 99 * 101 = | | 4) 100 * 100 - 1 * 1 = 9999 |
| 5) | 196 * 204 = | | 5) 200 * 200 - 4 * 4 = 39984 |
| 6) | 392 * 408 = | | 6) 400 * 400 - 8 * 8 = 159936 |
| 7) | 105 * 95 = | | 7) 100 * 100 - 5 * 5 = 9975 |
| 8) | 394 * 406 = | | 8) 400 * 400 - 6 * 6 = 159964 |
| 9) | 401 * 399 = | | 9) 400 * 400 - 1 * 1 = 159999 |
| 10) | 403 * 397 = | | 10) 400 * 400 - 3 * 3 = 159991 |
| 11) | 169 * 88 - 69 * 88 = | | 11) ( 169 - 69) * 88 = 8800 |
| 12) | 150 * 37 - 50 * 37 = | | 12) ( 150 - 50) * 37 = 3700 |
| 13) | 31 * 51 + 31 * 49 = | | 13) ( 51 + 49) * 31 = 3100 |
| 14) | 36 * 78 + 64 * 78 = | | 14) ( 64 + 36) * 78 = 7800 |
| 15) | 81 * 30 + 81 * 70 = | | 15) ( 30 + 70) * 81 = 8100 |
| 16) | 149 * 58 - 49 * 58 = | | 16) ( 149 - 49) * 58 = 5800 |
| 17) | 52 * 53 + 47 * 52 = | | 17) ( 47 + 53) * 52 = 5200 |
| 18) | 53 * 71 + 53 * 29 = | | 18) ( 29 + 71) * 53 = 5300 |
| 19) | 88 * 43 + 88 * 157 = | | 19) ( 157 + 43) * 88 = 17600 |
| 20) | 268 * 29 - 68 * 29 = | | 20) ( 268 - 68) * 29 = 5800 |
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Score: ______________ | |
