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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Tuesday September 15 2026
05:13:45 AM | Tuesday September 15 2026
05:13:45 AMFlip Answers |
| 1) | 295 * 305 = | | 1) 300 * 300 - 5 * 5 = 89975 |
| 2) | 399 * 401 = | | 2) 400 * 400 - 1 * 1 = 159999 |
| 3) | 202 * 198 = | | 3) 200 * 200 - 2 * 2 = 39996 |
| 4) | 293 * 307 = | | 4) 300 * 300 - 7 * 7 = 89951 |
| 5) | 310 * 290 = | | 5) 300 * 300 - 10 * 10 = 89900 |
| 6) | 191 * 209 = | | 6) 200 * 200 - 9 * 9 = 39919 |
| 7) | 104 * 96 = | | 7) 100 * 100 - 4 * 4 = 9984 |
| 8) | 191 * 209 = | | 8) 200 * 200 - 9 * 9 = 39919 |
| 9) | 393 * 407 = | | 9) 400 * 400 - 7 * 7 = 159951 |
| 10) | 207 * 193 = | | 10) 200 * 200 - 7 * 7 = 39951 |
| 11) | 67 * 174 - 74 * 67 = | | 11) ( 174 - 74) * 67 = 6700 |
| 12) | 241 * 88 - 88 * 41 = | | 12) ( 241 - 41) * 88 = 17600 |
| 13) | 263 * 91 - 91 * 63 = | | 13) ( 263 - 63) * 91 = 18200 |
| 14) | 41 * 33 + 59 * 33 = | | 14) ( 41 + 59) * 33 = 3300 |
| 15) | 64 * 150 - 64 * 50 = | | 15) ( 150 - 50) * 64 = 6400 |
| 16) | 150 * 61 - 50 * 61 = | | 16) ( 150 - 50) * 61 = 6100 |
| 17) | 161 * 53 - 61 * 53 = | | 17) ( 161 - 61) * 53 = 5300 |
| 18) | 45 * 147 - 45 * 47 = | | 18) ( 147 - 47) * 45 = 4500 |
| 19) | 87 * 272 - 87 * 72 = | | 19) ( 272 - 72) * 87 = 17400 |
| 20) | 70 * 35 + 165 * 70 = | | 20) ( 165 + 35) * 70 = 14000 |
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Score: ______________ | |
