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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Saturday December 06 2025
08:39:00 PM | Saturday December 06 2025
08:39:00 PMFlip Answers |
| 1) | 92 * 108 = | | 1) 100 * 100 - 8 * 8 = 9936 |
| 2) | 304 * 296 = | | 2) 300 * 300 - 4 * 4 = 89984 |
| 3) | 398 * 402 = | | 3) 400 * 400 - 2 * 2 = 159996 |
| 4) | 105 * 95 = | | 4) 100 * 100 - 5 * 5 = 9975 |
| 5) | 408 * 392 = | | 5) 400 * 400 - 8 * 8 = 159936 |
| 6) | 304 * 296 = | | 6) 300 * 300 - 4 * 4 = 89984 |
| 7) | 92 * 108 = | | 7) 100 * 100 - 8 * 8 = 9936 |
| 8) | 298 * 302 = | | 8) 300 * 300 - 2 * 2 = 89996 |
| 9) | 195 * 205 = | | 9) 200 * 200 - 5 * 5 = 39975 |
| 10) | 196 * 204 = | | 10) 200 * 200 - 4 * 4 = 39984 |
| 11) | 62 * 85 + 38 * 85 = | | 11) ( 62 + 38) * 85 = 8500 |
| 12) | 235 * 73 - 35 * 73 = | | 12) ( 235 - 35) * 73 = 14600 |
| 13) | 84 * 53 + 84 * 47 = | | 13) ( 47 + 53) * 84 = 8400 |
| 14) | 75 * 85 + 85 * 125 = | | 14) ( 125 + 75) * 85 = 17000 |
| 15) | 30 * 77 + 77 * 70 = | | 15) ( 30 + 70) * 77 = 7700 |
| 16) | 50 * 144 - 44 * 50 = | | 16) ( 144 - 44) * 50 = 5000 |
| 17) | 60 * 249 - 49 * 60 = | | 17) ( 249 - 49) * 60 = 12000 |
| 18) | 61 * 73 + 127 * 61 = | | 18) ( 127 + 73) * 61 = 12200 |
| 19) | 151 * 36 - 36 * 51 = | | 19) ( 151 - 51) * 36 = 3600 |
| 20) | 143 * 71 - 71 * 43 = | | 20) ( 143 - 43) * 71 = 7100 |
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Score: ______________ | |
