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 March 09 2026
02:41:00 PM | Monday March 09 2026
02:41:00 PMFlip Answers |
| 1) | 294 * 306 = | | 1) 300 * 300 - 6 * 6 = 89964 |
| 2) | 195 * 205 = | | 2) 200 * 200 - 5 * 5 = 39975 |
| 3) | 103 * 97 = | | 3) 100 * 100 - 3 * 3 = 9991 |
| 4) | 401 * 399 = | | 4) 400 * 400 - 1 * 1 = 159999 |
| 5) | 297 * 303 = | | 5) 300 * 300 - 3 * 3 = 89991 |
| 6) | 102 * 98 = | | 6) 100 * 100 - 2 * 2 = 9996 |
| 7) | 95 * 105 = | | 7) 100 * 100 - 5 * 5 = 9975 |
| 8) | 295 * 305 = | | 8) 300 * 300 - 5 * 5 = 89975 |
| 9) | 296 * 304 = | | 9) 300 * 300 - 4 * 4 = 89984 |
| 10) | 291 * 309 = | | 10) 300 * 300 - 9 * 9 = 89919 |
| 11) | 25 * 249 - 25 * 49 = | | 11) ( 249 - 49) * 25 = 5000 |
| 12) | 72 * 69 + 72 * 31 = | | 12) ( 31 + 69) * 72 = 7200 |
| 13) | 28 * 75 + 28 * 125 = | | 13) ( 125 + 75) * 28 = 5600 |
| 14) | 36 * 164 + 36 * 36 = | | 14) ( 164 + 36) * 36 = 7200 |
| 15) | 94 * 62 + 94 * 138 = | | 15) ( 138 + 62) * 94 = 18800 |
| 16) | 85 * 142 - 42 * 85 = | | 16) ( 142 - 42) * 85 = 8500 |
| 17) | 68 * 91 + 32 * 91 = | | 17) ( 32 + 68) * 91 = 9100 |
| 18) | 262 * 91 - 62 * 91 = | | 18) ( 262 - 62) * 91 = 18200 |
| 19) | 79 * 153 + 47 * 79 = | | 19) ( 153 + 47) * 79 = 15800 |
| 20) | 60 * 167 - 67 * 60 = | | 20) ( 167 - 67) * 60 = 6000 |
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Score: ______________ | |
