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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Saturday October 24 2026
06:20:47 AM | Saturday October 24 2026
06:20:47 AMFlip Answers |
| 1) | 301 * 299 = | | 1) 300 * 300 - 1 * 1 = 89999 |
| 2) | 393 * 407 = | | 2) 400 * 400 - 7 * 7 = 159951 |
| 3) | 99 * 101 = | | 3) 100 * 100 - 1 * 1 = 9999 |
| 4) | 297 * 303 = | | 4) 300 * 300 - 3 * 3 = 89991 |
| 5) | 392 * 408 = | | 5) 400 * 400 - 8 * 8 = 159936 |
| 6) | 293 * 307 = | | 6) 300 * 300 - 7 * 7 = 89951 |
| 7) | 401 * 399 = | | 7) 400 * 400 - 1 * 1 = 159999 |
| 8) | 294 * 306 = | | 8) 300 * 300 - 6 * 6 = 89964 |
| 9) | 297 * 303 = | | 9) 300 * 300 - 3 * 3 = 89991 |
| 10) | 398 * 402 = | | 10) 400 * 400 - 2 * 2 = 159996 |
| 11) | 26 * 54 + 74 * 54 = | | 11) ( 26 + 74) * 54 = 5400 |
| 12) | 162 * 97 + 97 * 38 = | | 12) ( 162 + 38) * 97 = 19400 |
| 13) | 56 * 259 - 56 * 59 = | | 13) ( 259 - 59) * 56 = 11200 |
| 14) | 86 * 251 - 86 * 51 = | | 14) ( 251 - 51) * 86 = 17200 |
| 15) | 252 * 46 - 52 * 46 = | | 15) ( 252 - 52) * 46 = 9200 |
| 16) | 55 * 138 - 38 * 55 = | | 16) ( 138 - 38) * 55 = 5500 |
| 17) | 55 * 44 + 55 * 56 = | | 17) ( 44 + 56) * 55 = 5500 |
| 18) | 38 * 35 + 38 * 65 = | | 18) ( 35 + 65) * 38 = 3800 |
| 19) | 243 * 74 - 43 * 74 = | | 19) ( 243 - 43) * 74 = 14800 |
| 20) | 240 * 40 - 40 * 40 = | | 20) ( 240 - 40) * 40 = 8000 |
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Score: ______________ | |
