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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Sunday July 12 2026
05:49:56 AM | Sunday July 12 2026
05:49:56 AMFlip Answers |
| 1) | 108 * 92 = | | 1) 100 * 100 - 8 * 8 = 9936 |
| 2) | 407 * 393 = | | 2) 400 * 400 - 7 * 7 = 159951 |
| 3) | 303 * 297 = | | 3) 300 * 300 - 3 * 3 = 89991 |
| 4) | 208 * 192 = | | 4) 200 * 200 - 8 * 8 = 39936 |
| 5) | 301 * 299 = | | 5) 300 * 300 - 1 * 1 = 89999 |
| 6) | 390 * 410 = | | 6) 400 * 400 - 10 * 10 = 159900 |
| 7) | 297 * 303 = | | 7) 300 * 300 - 3 * 3 = 89991 |
| 8) | 403 * 397 = | | 8) 400 * 400 - 3 * 3 = 159991 |
| 9) | 104 * 96 = | | 9) 100 * 100 - 4 * 4 = 9984 |
| 10) | 308 * 292 = | | 10) 300 * 300 - 8 * 8 = 89936 |
| 11) | 57 * 35 + 165 * 57 = | | 11) ( 165 + 35) * 57 = 11400 |
| 12) | 143 * 71 - 71 * 43 = | | 12) ( 143 - 43) * 71 = 7100 |
| 13) | 59 * 62 + 62 * 141 = | | 13) ( 141 + 59) * 62 = 12400 |
| 14) | 53 * 27 + 27 * 47 = | | 14) ( 53 + 47) * 27 = 2700 |
| 15) | 94 * 42 + 58 * 94 = | | 15) ( 42 + 58) * 94 = 9400 |
| 16) | 70 * 36 + 30 * 36 = | | 16) ( 30 + 70) * 36 = 3600 |
| 17) | 33 * 153 - 33 * 53 = | | 17) ( 153 - 53) * 33 = 3300 |
| 18) | 79 * 248 - 48 * 79 = | | 18) ( 248 - 48) * 79 = 15800 |
| 19) | 69 * 236 - 36 * 69 = | | 19) ( 236 - 36) * 69 = 13800 |
| 20) | 76 * 159 - 59 * 76 = | | 20) ( 159 - 59) * 76 = 7600 |
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Score: ______________ | |
