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 19 2026
06:34:40 AM | Thursday March 19 2026
06:34:40 AMFlip Answers |
| 1) | 95 * 105 = | | 1) 100 * 100 - 5 * 5 = 9975 |
| 2) | 107 * 93 = | | 2) 100 * 100 - 7 * 7 = 9951 |
| 3) | 404 * 396 = | | 3) 400 * 400 - 4 * 4 = 159984 |
| 4) | 303 * 297 = | | 4) 300 * 300 - 3 * 3 = 89991 |
| 5) | 296 * 304 = | | 5) 300 * 300 - 4 * 4 = 89984 |
| 6) | 191 * 209 = | | 6) 200 * 200 - 9 * 9 = 39919 |
| 7) | 201 * 199 = | | 7) 200 * 200 - 1 * 1 = 39999 |
| 8) | 192 * 208 = | | 8) 200 * 200 - 8 * 8 = 39936 |
| 9) | 299 * 301 = | | 9) 300 * 300 - 1 * 1 = 89999 |
| 10) | 105 * 95 = | | 10) 100 * 100 - 5 * 5 = 9975 |
| 11) | 174 * 76 - 76 * 74 = | | 11) ( 174 - 74) * 76 = 7600 |
| 12) | 160 * 72 + 40 * 72 = | | 12) ( 160 + 40) * 72 = 14400 |
| 13) | 93 * 247 - 93 * 47 = | | 13) ( 247 - 47) * 93 = 18600 |
| 14) | 78 * 156 - 78 * 56 = | | 14) ( 156 - 56) * 78 = 7800 |
| 15) | 24 * 251 - 24 * 51 = | | 15) ( 251 - 51) * 24 = 4800 |
| 16) | 63 * 155 - 63 * 55 = | | 16) ( 155 - 55) * 63 = 6300 |
| 17) | 60 * 146 - 46 * 60 = | | 17) ( 146 - 46) * 60 = 6000 |
| 18) | 27 * 70 + 30 * 27 = | | 18) ( 30 + 70) * 27 = 2700 |
| 19) | 31 * 265 - 31 * 65 = | | 19) ( 265 - 65) * 31 = 6200 |
| 20) | 71 * 43 + 71 * 157 = | | 20) ( 157 + 43) * 71 = 14200 |
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Score: ______________ | |
