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 August 24 2026
06:26:45 AM | Monday August 24 2026
06:26:45 AMFlip Answers |
| 1) | 209 * 191 = | | 1) 200 * 200 - 9 * 9 = 39919 |
| 2) | 92 * 108 = | | 2) 100 * 100 - 8 * 8 = 9936 |
| 3) | 94 * 106 = | | 3) 100 * 100 - 6 * 6 = 9964 |
| 4) | 208 * 192 = | | 4) 200 * 200 - 8 * 8 = 39936 |
| 5) | 301 * 299 = | | 5) 300 * 300 - 1 * 1 = 89999 |
| 6) | 206 * 194 = | | 6) 200 * 200 - 6 * 6 = 39964 |
| 7) | 203 * 197 = | | 7) 200 * 200 - 3 * 3 = 39991 |
| 8) | 399 * 401 = | | 8) 400 * 400 - 1 * 1 = 159999 |
| 9) | 194 * 206 = | | 9) 200 * 200 - 6 * 6 = 39964 |
| 10) | 104 * 96 = | | 10) 100 * 100 - 4 * 4 = 9984 |
| 11) | 166 * 62 - 66 * 62 = | | 11) ( 166 - 66) * 62 = 6200 |
| 12) | 34 * 22 + 66 * 22 = | | 12) ( 34 + 66) * 22 = 2200 |
| 13) | 66 * 155 - 55 * 66 = | | 13) ( 155 - 55) * 66 = 6600 |
| 14) | 272 * 92 - 92 * 72 = | | 14) ( 272 - 72) * 92 = 18400 |
| 15) | 66 * 261 - 61 * 66 = | | 15) ( 261 - 61) * 66 = 13200 |
| 16) | 260 * 55 - 60 * 55 = | | 16) ( 260 - 60) * 55 = 11000 |
| 17) | 173 * 24 - 73 * 24 = | | 17) ( 173 - 73) * 24 = 2400 |
| 18) | 95 * 36 + 164 * 95 = | | 18) ( 164 + 36) * 95 = 19000 |
| 19) | 47 * 36 + 64 * 47 = | | 19) ( 64 + 36) * 47 = 4700 |
| 20) | 96 * 252 - 96 * 52 = | | 20) ( 252 - 52) * 96 = 19200 |
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Score: ______________ | |
