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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Friday August 28 2026
08:05:04 AM | Friday August 28 2026
08:05:04 AMFlip Answers |
| 1) | 96 * 104 = | | 1) 100 * 100 - 4 * 4 = 9984 |
| 2) | 93 * 107 = | | 2) 100 * 100 - 7 * 7 = 9951 |
| 3) | 309 * 291 = | | 3) 300 * 300 - 9 * 9 = 89919 |
| 4) | 108 * 92 = | | 4) 100 * 100 - 8 * 8 = 9936 |
| 5) | 401 * 399 = | | 5) 400 * 400 - 1 * 1 = 159999 |
| 6) | 202 * 198 = | | 6) 200 * 200 - 2 * 2 = 39996 |
| 7) | 295 * 305 = | | 7) 300 * 300 - 5 * 5 = 89975 |
| 8) | 304 * 296 = | | 8) 300 * 300 - 4 * 4 = 89984 |
| 9) | 193 * 207 = | | 9) 200 * 200 - 7 * 7 = 39951 |
| 10) | 194 * 206 = | | 10) 200 * 200 - 6 * 6 = 39964 |
| 11) | 64 * 82 + 36 * 82 = | | 11) ( 36 + 64) * 82 = 8200 |
| 12) | 271 * 42 - 71 * 42 = | | 12) ( 271 - 71) * 42 = 8400 |
| 13) | 142 * 91 - 42 * 91 = | | 13) ( 142 - 42) * 91 = 9100 |
| 14) | 47 * 55 + 153 * 55 = | | 14) ( 153 + 47) * 55 = 11000 |
| 15) | 51 * 55 + 51 * 45 = | | 15) ( 45 + 55) * 51 = 5100 |
| 16) | 45 * 78 + 78 * 55 = | | 16) ( 45 + 55) * 78 = 7800 |
| 17) | 143 * 27 - 27 * 43 = | | 17) ( 143 - 43) * 27 = 2700 |
| 18) | 68 * 149 + 51 * 68 = | | 18) ( 149 + 51) * 68 = 13600 |
| 19) | 74 * 169 - 74 * 69 = | | 19) ( 169 - 69) * 74 = 7400 |
| 20) | 95 * 52 + 48 * 95 = | | 20) ( 48 + 52) * 95 = 9500 |
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Score: ______________ | |
