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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Friday February 13 2026
07:01:43 AM | Friday February 13 2026
07:01:43 AMFlip Answers |
| 1) | 92 * 108 = | | 1) 100 * 100 - 8 * 8 = 9936 |
| 2) | 403 * 397 = | | 2) 400 * 400 - 3 * 3 = 159991 |
| 3) | 298 * 302 = | | 3) 300 * 300 - 2 * 2 = 89996 |
| 4) | 296 * 304 = | | 4) 300 * 300 - 4 * 4 = 89984 |
| 5) | 102 * 98 = | | 5) 100 * 100 - 2 * 2 = 9996 |
| 6) | 197 * 203 = | | 6) 200 * 200 - 3 * 3 = 39991 |
| 7) | 295 * 305 = | | 7) 300 * 300 - 5 * 5 = 89975 |
| 8) | 406 * 394 = | | 8) 400 * 400 - 6 * 6 = 159964 |
| 9) | 107 * 93 = | | 9) 100 * 100 - 7 * 7 = 9951 |
| 10) | 394 * 406 = | | 10) 400 * 400 - 6 * 6 = 159964 |
| 11) | 81 * 146 + 54 * 81 = | | 11) ( 146 + 54) * 81 = 16200 |
| 12) | 247 * 83 - 83 * 47 = | | 12) ( 247 - 47) * 83 = 16600 |
| 13) | 130 * 60 + 60 * 70 = | | 13) ( 130 + 70) * 60 = 12000 |
| 14) | 47 * 174 - 74 * 47 = | | 14) ( 174 - 74) * 47 = 4700 |
| 15) | 47 * 160 - 60 * 47 = | | 15) ( 160 - 60) * 47 = 4700 |
| 16) | 43 * 273 - 43 * 73 = | | 16) ( 273 - 73) * 43 = 8600 |
| 17) | 87 * 128 + 72 * 87 = | | 17) ( 128 + 72) * 87 = 17400 |
| 18) | 43 * 93 + 93 * 157 = | | 18) ( 157 + 43) * 93 = 18600 |
| 19) | 54 * 92 + 92 * 146 = | | 19) ( 146 + 54) * 92 = 18400 |
| 20) | 62 * 50 + 50 * 138 = | | 20) ( 138 + 62) * 50 = 10000 |
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Score: ______________ | |
