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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Monday December 01 2025
06:16:13 AM | Monday December 01 2025
06:16:13 AMFlip Answers |
| 1) | 92 * 108 = | | 1) 100 * 100 - 8 * 8 = 9936 |
| 2) | 304 * 296 = | | 2) 300 * 300 - 4 * 4 = 89984 |
| 3) | 102 * 98 = | | 3) 100 * 100 - 2 * 2 = 9996 |
| 4) | 94 * 106 = | | 4) 100 * 100 - 6 * 6 = 9964 |
| 5) | 207 * 193 = | | 5) 200 * 200 - 7 * 7 = 39951 |
| 6) | 102 * 98 = | | 6) 100 * 100 - 2 * 2 = 9996 |
| 7) | 394 * 406 = | | 7) 400 * 400 - 6 * 6 = 159964 |
| 8) | 309 * 291 = | | 8) 300 * 300 - 9 * 9 = 89919 |
| 9) | 110 * 90 = | | 9) 100 * 100 - 10 * 10 = 9900 |
| 10) | 392 * 408 = | | 10) 400 * 400 - 8 * 8 = 159936 |
| 11) | 167 * 88 - 88 * 67 = | | 11) ( 167 - 67) * 88 = 8800 |
| 12) | 271 * 55 - 71 * 55 = | | 12) ( 271 - 71) * 55 = 11000 |
| 13) | 36 * 140 - 36 * 40 = | | 13) ( 140 - 40) * 36 = 3600 |
| 14) | 244 * 49 - 49 * 44 = | | 14) ( 244 - 44) * 49 = 9800 |
| 15) | 55 * 92 + 92 * 45 = | | 15) ( 45 + 55) * 92 = 9200 |
| 16) | 46 * 75 + 75 * 54 = | | 16) ( 54 + 46) * 75 = 7500 |
| 17) | 254 * 74 - 74 * 54 = | | 17) ( 254 - 54) * 74 = 14800 |
| 18) | 28 * 41 + 28 * 159 = | | 18) ( 159 + 41) * 28 = 5600 |
| 19) | 42 * 148 + 52 * 42 = | | 19) ( 148 + 52) * 42 = 8400 |
| 20) | 246 * 92 - 92 * 46 = | | 20) ( 246 - 46) * 92 = 18400 |
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Score: ______________ | |
