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 June 13 2026
01:21:52 AM | Saturday June 13 2026
01:21:52 AMFlip Answers |
| 1) | 408 * 392 = | | 1) 400 * 400 - 8 * 8 = 159936 |
| 2) | 198 * 202 = | | 2) 200 * 200 - 2 * 2 = 39996 |
| 3) | 291 * 309 = | | 3) 300 * 300 - 9 * 9 = 89919 |
| 4) | 191 * 209 = | | 4) 200 * 200 - 9 * 9 = 39919 |
| 5) | 92 * 108 = | | 5) 100 * 100 - 8 * 8 = 9936 |
| 6) | 306 * 294 = | | 6) 300 * 300 - 6 * 6 = 89964 |
| 7) | 290 * 310 = | | 7) 300 * 300 - 10 * 10 = 89900 |
| 8) | 203 * 197 = | | 8) 200 * 200 - 3 * 3 = 39991 |
| 9) | 101 * 99 = | | 9) 100 * 100 - 1 * 1 = 9999 |
| 10) | 294 * 306 = | | 10) 300 * 300 - 6 * 6 = 89964 |
| 11) | 94 * 175 - 94 * 75 = | | 11) ( 175 - 75) * 94 = 9400 |
| 12) | 82 * 54 + 82 * 46 = | | 12) ( 46 + 54) * 82 = 8200 |
| 13) | 59 * 254 - 59 * 54 = | | 13) ( 254 - 54) * 59 = 11800 |
| 14) | 32 * 160 - 60 * 32 = | | 14) ( 160 - 60) * 32 = 3200 |
| 15) | 240 * 22 - 22 * 40 = | | 15) ( 240 - 40) * 22 = 4400 |
| 16) | 146 * 47 - 47 * 46 = | | 16) ( 146 - 46) * 47 = 4700 |
| 17) | 86 * 74 + 86 * 26 = | | 17) ( 26 + 74) * 86 = 8600 |
| 18) | 170 * 26 - 26 * 70 = | | 18) ( 170 - 70) * 26 = 2600 |
| 19) | 30 * 35 + 70 * 35 = | | 19) ( 30 + 70) * 35 = 3500 |
| 20) | 57 * 158 - 58 * 57 = | | 20) ( 158 - 58) * 57 = 5700 |
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Score: ______________ | |
