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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Monday February 23 2026
12:13:38 PM | Monday February 23 2026
12:13:38 PMFlip Answers |
| 1) | 296 * 304 = | | 1) 300 * 300 - 4 * 4 = 89984 |
| 2) | 409 * 391 = | | 2) 400 * 400 - 9 * 9 = 159919 |
| 3) | 294 * 306 = | | 3) 300 * 300 - 6 * 6 = 89964 |
| 4) | 399 * 401 = | | 4) 400 * 400 - 1 * 1 = 159999 |
| 5) | 207 * 193 = | | 5) 200 * 200 - 7 * 7 = 39951 |
| 6) | 205 * 195 = | | 6) 200 * 200 - 5 * 5 = 39975 |
| 7) | 394 * 406 = | | 7) 400 * 400 - 6 * 6 = 159964 |
| 8) | 295 * 305 = | | 8) 300 * 300 - 5 * 5 = 89975 |
| 9) | 191 * 209 = | | 9) 200 * 200 - 9 * 9 = 39919 |
| 10) | 97 * 103 = | | 10) 100 * 100 - 3 * 3 = 9991 |
| 11) | 51 * 56 + 51 * 44 = | | 11) ( 56 + 44) * 51 = 5100 |
| 12) | 273 * 71 - 73 * 71 = | | 12) ( 273 - 73) * 71 = 14200 |
| 13) | 52 * 94 + 48 * 94 = | | 13) ( 48 + 52) * 94 = 9400 |
| 14) | 86 * 158 - 86 * 58 = | | 14) ( 158 - 58) * 86 = 8600 |
| 15) | 62 * 61 + 38 * 61 = | | 15) ( 62 + 38) * 61 = 6100 |
| 16) | 75 * 44 + 44 * 125 = | | 16) ( 125 + 75) * 44 = 8800 |
| 17) | 48 * 40 + 40 * 52 = | | 17) ( 48 + 52) * 40 = 4000 |
| 18) | 89 * 149 - 89 * 49 = | | 18) ( 149 - 49) * 89 = 8900 |
| 19) | 47 * 258 - 58 * 47 = | | 19) ( 258 - 58) * 47 = 9400 |
| 20) | 97 * 241 - 41 * 97 = | | 20) ( 241 - 41) * 97 = 19400 |
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Score: ______________ | |
