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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Wednesday March 04 2026
08:07:09 AM | Wednesday March 04 2026
08:07:09 AMFlip Answers |
| 1) | 292 * 308 = | | 1) 300 * 300 - 8 * 8 = 89936 |
| 2) | 296 * 304 = | | 2) 300 * 300 - 4 * 4 = 89984 |
| 3) | 109 * 91 = | | 3) 100 * 100 - 9 * 9 = 9919 |
| 4) | 96 * 104 = | | 4) 100 * 100 - 4 * 4 = 9984 |
| 5) | 395 * 405 = | | 5) 400 * 400 - 5 * 5 = 159975 |
| 6) | 290 * 310 = | | 6) 300 * 300 - 10 * 10 = 89900 |
| 7) | 301 * 299 = | | 7) 300 * 300 - 1 * 1 = 89999 |
| 8) | 207 * 193 = | | 8) 200 * 200 - 7 * 7 = 39951 |
| 9) | 193 * 207 = | | 9) 200 * 200 - 7 * 7 = 39951 |
| 10) | 207 * 193 = | | 10) 200 * 200 - 7 * 7 = 39951 |
| 11) | 63 * 53 + 37 * 53 = | | 11) ( 63 + 37) * 53 = 5300 |
| 12) | 59 * 88 + 41 * 88 = | | 12) ( 41 + 59) * 88 = 8800 |
| 13) | 68 * 49 + 49 * 132 = | | 13) ( 132 + 68) * 49 = 9800 |
| 14) | 150 * 24 - 50 * 24 = | | 14) ( 150 - 50) * 24 = 2400 |
| 15) | 174 * 43 - 43 * 74 = | | 15) ( 174 - 74) * 43 = 4300 |
| 16) | 273 * 32 - 32 * 73 = | | 16) ( 273 - 73) * 32 = 6400 |
| 17) | 67 * 43 + 67 * 157 = | | 17) ( 157 + 43) * 67 = 13400 |
| 18) | 27 * 170 - 70 * 27 = | | 18) ( 170 - 70) * 27 = 2700 |
| 19) | 93 * 264 - 93 * 64 = | | 19) ( 264 - 64) * 93 = 18600 |
| 20) | 89 * 175 - 75 * 89 = | | 20) ( 175 - 75) * 89 = 8900 |
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Score: ______________ | |
