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 February 18 2026
06:33:34 AM | Wednesday February 18 2026
06:33:34 AMFlip Answers |
| 1) | 94 * 106 = | | 1) 100 * 100 - 6 * 6 = 9964 |
| 2) | 392 * 408 = | | 2) 400 * 400 - 8 * 8 = 159936 |
| 3) | 191 * 209 = | | 3) 200 * 200 - 9 * 9 = 39919 |
| 4) | 310 * 290 = | | 4) 300 * 300 - 10 * 10 = 89900 |
| 5) | 294 * 306 = | | 5) 300 * 300 - 6 * 6 = 89964 |
| 6) | 95 * 105 = | | 6) 100 * 100 - 5 * 5 = 9975 |
| 7) | 191 * 209 = | | 7) 200 * 200 - 9 * 9 = 39919 |
| 8) | 206 * 194 = | | 8) 200 * 200 - 6 * 6 = 39964 |
| 9) | 192 * 208 = | | 9) 200 * 200 - 8 * 8 = 39936 |
| 10) | 391 * 409 = | | 10) 400 * 400 - 9 * 9 = 159919 |
| 11) | 42 * 145 - 42 * 45 = | | 11) ( 145 - 45) * 42 = 4200 |
| 12) | 261 * 37 - 37 * 61 = | | 12) ( 261 - 61) * 37 = 7400 |
| 13) | 67 * 140 - 40 * 67 = | | 13) ( 140 - 40) * 67 = 6700 |
| 14) | 44 * 73 + 127 * 44 = | | 14) ( 127 + 73) * 44 = 8800 |
| 15) | 75 * 263 - 63 * 75 = | | 15) ( 263 - 63) * 75 = 15000 |
| 16) | 264 * 22 - 22 * 64 = | | 16) ( 264 - 64) * 22 = 4400 |
| 17) | 79 * 67 + 33 * 79 = | | 17) ( 33 + 67) * 79 = 7900 |
| 18) | 34 * 160 + 34 * 40 = | | 18) ( 160 + 40) * 34 = 6800 |
| 19) | 145 * 95 + 95 * 55 = | | 19) ( 145 + 55) * 95 = 19000 |
| 20) | 35 * 27 + 165 * 27 = | | 20) ( 165 + 35) * 27 = 5400 |
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Score: ______________ | |
