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 October 27 2026
07:03:53 AM | Tuesday October 27 2026
07:03:53 AMFlip Answers |
| 1) | 305 * 295 = | | 1) 300 * 300 - 5 * 5 = 89975 |
| 2) | 292 * 308 = | | 2) 300 * 300 - 8 * 8 = 89936 |
| 3) | 306 * 294 = | | 3) 300 * 300 - 6 * 6 = 89964 |
| 4) | 405 * 395 = | | 4) 400 * 400 - 5 * 5 = 159975 |
| 5) | 407 * 393 = | | 5) 400 * 400 - 7 * 7 = 159951 |
| 6) | 103 * 97 = | | 6) 100 * 100 - 3 * 3 = 9991 |
| 7) | 403 * 397 = | | 7) 400 * 400 - 3 * 3 = 159991 |
| 8) | 297 * 303 = | | 8) 300 * 300 - 3 * 3 = 89991 |
| 9) | 395 * 405 = | | 9) 400 * 400 - 5 * 5 = 159975 |
| 10) | 307 * 293 = | | 10) 300 * 300 - 7 * 7 = 89951 |
| 11) | 22 * 67 + 33 * 22 = | | 11) ( 33 + 67) * 22 = 2200 |
| 12) | 53 * 244 - 44 * 53 = | | 12) ( 244 - 44) * 53 = 10600 |
| 13) | 41 * 264 - 64 * 41 = | | 13) ( 264 - 64) * 41 = 8200 |
| 14) | 35 * 136 - 36 * 35 = | | 14) ( 136 - 36) * 35 = 3500 |
| 15) | 52 * 166 - 66 * 52 = | | 15) ( 166 - 66) * 52 = 5200 |
| 16) | 159 * 97 + 41 * 97 = | | 16) ( 159 + 41) * 97 = 19400 |
| 17) | 37 * 68 + 68 * 63 = | | 17) ( 63 + 37) * 68 = 6800 |
| 18) | 54 * 270 - 54 * 70 = | | 18) ( 270 - 70) * 54 = 10800 |
| 19) | 94 * 172 - 72 * 94 = | | 19) ( 172 - 72) * 94 = 9400 |
| 20) | 152 * 40 - 52 * 40 = | | 20) ( 152 - 52) * 40 = 4000 |
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Score: ______________ | |
