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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Thursday December 11 2025
11:45:32 AM | Thursday December 11 2025
11:45:32 AMFlip Answers |
| 1) | 292 * 308 = | | 1) 300 * 300 - 8 * 8 = 89936 |
| 2) | 404 * 396 = | | 2) 400 * 400 - 4 * 4 = 159984 |
| 3) | 409 * 391 = | | 3) 400 * 400 - 9 * 9 = 159919 |
| 4) | 410 * 390 = | | 4) 400 * 400 - 10 * 10 = 159900 |
| 5) | 201 * 199 = | | 5) 200 * 200 - 1 * 1 = 39999 |
| 6) | 99 * 101 = | | 6) 100 * 100 - 1 * 1 = 9999 |
| 7) | 97 * 103 = | | 7) 100 * 100 - 3 * 3 = 9991 |
| 8) | 297 * 303 = | | 8) 300 * 300 - 3 * 3 = 89991 |
| 9) | 395 * 405 = | | 9) 400 * 400 - 5 * 5 = 159975 |
| 10) | 104 * 96 = | | 10) 100 * 100 - 4 * 4 = 9984 |
| 11) | 26 * 54 + 54 * 74 = | | 11) ( 26 + 74) * 54 = 5400 |
| 12) | 164 * 95 + 36 * 95 = | | 12) ( 164 + 36) * 95 = 19000 |
| 13) | 42 * 45 + 158 * 45 = | | 13) ( 158 + 42) * 45 = 9000 |
| 14) | 246 * 57 - 57 * 46 = | | 14) ( 246 - 46) * 57 = 11400 |
| 15) | 57 * 66 + 57 * 134 = | | 15) ( 134 + 66) * 57 = 11400 |
| 16) | 47 * 260 - 60 * 47 = | | 16) ( 260 - 60) * 47 = 9400 |
| 17) | 50 * 36 + 36 * 50 = | | 17) ( 50 + 50) * 36 = 3600 |
| 18) | 73 * 68 + 73 * 132 = | | 18) ( 132 + 68) * 73 = 14600 |
| 19) | 163 * 43 - 63 * 43 = | | 19) ( 163 - 63) * 43 = 4300 |
| 20) | 164 * 87 - 64 * 87 = | | 20) ( 164 - 64) * 87 = 8700 |
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Score: ______________ | |
