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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Thursday March 05 2026
05:46:15 AM | Thursday March 05 2026
05:46:15 AMFlip Answers |
| 1) | 95 * 105 = | | 1) 100 * 100 - 5 * 5 = 9975 |
| 2) | 110 * 90 = | | 2) 100 * 100 - 10 * 10 = 9900 |
| 3) | 104 * 96 = | | 3) 100 * 100 - 4 * 4 = 9984 |
| 4) | 192 * 208 = | | 4) 200 * 200 - 8 * 8 = 39936 |
| 5) | 301 * 299 = | | 5) 300 * 300 - 1 * 1 = 89999 |
| 6) | 397 * 403 = | | 6) 400 * 400 - 3 * 3 = 159991 |
| 7) | 406 * 394 = | | 7) 400 * 400 - 6 * 6 = 159964 |
| 8) | 94 * 106 = | | 8) 100 * 100 - 6 * 6 = 9964 |
| 9) | 310 * 290 = | | 9) 300 * 300 - 10 * 10 = 89900 |
| 10) | 296 * 304 = | | 10) 300 * 300 - 4 * 4 = 89984 |
| 11) | 73 * 72 + 128 * 73 = | | 11) ( 128 + 72) * 73 = 14600 |
| 12) | 93 * 172 - 93 * 72 = | | 12) ( 172 - 72) * 93 = 9300 |
| 13) | 49 * 42 + 51 * 42 = | | 13) ( 51 + 49) * 42 = 4200 |
| 14) | 56 * 236 - 56 * 36 = | | 14) ( 236 - 36) * 56 = 11200 |
| 15) | 33 * 142 + 33 * 58 = | | 15) ( 142 + 58) * 33 = 6600 |
| 16) | 33 * 263 - 63 * 33 = | | 16) ( 263 - 63) * 33 = 6600 |
| 17) | 151 * 92 - 51 * 92 = | | 17) ( 151 - 51) * 92 = 9200 |
| 18) | 44 * 251 - 44 * 51 = | | 18) ( 251 - 51) * 44 = 8800 |
| 19) | 68 * 254 - 68 * 54 = | | 19) ( 254 - 54) * 68 = 13600 |
| 20) | 163 * 80 + 37 * 80 = | | 20) ( 163 + 37) * 80 = 16000 |
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Score: ______________ | |
