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 March 29 2026
05:38:50 PM | Sunday March 29 2026
05:38:50 PMFlip Answers |
| 1) | 104 * 96 = | | 1) 100 * 100 - 4 * 4 = 9984 |
| 2) | 397 * 403 = | | 2) 400 * 400 - 3 * 3 = 159991 |
| 3) | 410 * 390 = | | 3) 400 * 400 - 10 * 10 = 159900 |
| 4) | 304 * 296 = | | 4) 300 * 300 - 4 * 4 = 89984 |
| 5) | 303 * 297 = | | 5) 300 * 300 - 3 * 3 = 89991 |
| 6) | 105 * 95 = | | 6) 100 * 100 - 5 * 5 = 9975 |
| 7) | 102 * 98 = | | 7) 100 * 100 - 2 * 2 = 9996 |
| 8) | 393 * 407 = | | 8) 400 * 400 - 7 * 7 = 159951 |
| 9) | 403 * 397 = | | 9) 400 * 400 - 3 * 3 = 159991 |
| 10) | 95 * 105 = | | 10) 100 * 100 - 5 * 5 = 9975 |
| 11) | 272 * 73 - 72 * 73 = | | 11) ( 272 - 72) * 73 = 14600 |
| 12) | 25 * 267 - 67 * 25 = | | 12) ( 267 - 67) * 25 = 5000 |
| 13) | 73 * 66 + 66 * 27 = | | 13) ( 27 + 73) * 66 = 6600 |
| 14) | 254 * 52 - 52 * 54 = | | 14) ( 254 - 54) * 52 = 10400 |
| 15) | 96 * 175 - 75 * 96 = | | 15) ( 175 - 75) * 96 = 9600 |
| 16) | 235 * 87 - 35 * 87 = | | 16) ( 235 - 35) * 87 = 17400 |
| 17) | 162 * 85 - 62 * 85 = | | 17) ( 162 - 62) * 85 = 8500 |
| 18) | 46 * 59 + 59 * 154 = | | 18) ( 154 + 46) * 59 = 11800 |
| 19) | 26 * 241 - 41 * 26 = | | 19) ( 241 - 41) * 26 = 5200 |
| 20) | 74 * 36 + 64 * 74 = | | 20) ( 64 + 36) * 74 = 7400 |
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Score: ______________ | |
