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 December 23 2025
08:15:29 AM | Tuesday December 23 2025
08:15:29 AMFlip Answers |
| 1) | 298 * 302 = | | 1) 300 * 300 - 2 * 2 = 89996 |
| 2) | 91 * 109 = | | 2) 100 * 100 - 9 * 9 = 9919 |
| 3) | 108 * 92 = | | 3) 100 * 100 - 8 * 8 = 9936 |
| 4) | 102 * 98 = | | 4) 100 * 100 - 2 * 2 = 9996 |
| 5) | 298 * 302 = | | 5) 300 * 300 - 2 * 2 = 89996 |
| 6) | 308 * 292 = | | 6) 300 * 300 - 8 * 8 = 89936 |
| 7) | 195 * 205 = | | 7) 200 * 200 - 5 * 5 = 39975 |
| 8) | 96 * 104 = | | 8) 100 * 100 - 4 * 4 = 9984 |
| 9) | 90 * 110 = | | 9) 100 * 100 - 10 * 10 = 9900 |
| 10) | 104 * 96 = | | 10) 100 * 100 - 4 * 4 = 9984 |
| 11) | 60 * 264 - 64 * 60 = | | 11) ( 264 - 64) * 60 = 12000 |
| 12) | 236 * 56 - 36 * 56 = | | 12) ( 236 - 36) * 56 = 11200 |
| 13) | 256 * 72 - 72 * 56 = | | 13) ( 256 - 56) * 72 = 14400 |
| 14) | 50 * 75 + 75 * 50 = | | 14) ( 50 + 50) * 75 = 7500 |
| 15) | 159 * 68 - 59 * 68 = | | 15) ( 159 - 59) * 68 = 6800 |
| 16) | 29 * 160 + 29 * 40 = | | 16) ( 160 + 40) * 29 = 5800 |
| 17) | 49 * 173 - 49 * 73 = | | 17) ( 173 - 73) * 49 = 4900 |
| 18) | 73 * 253 - 73 * 53 = | | 18) ( 253 - 53) * 73 = 14600 |
| 19) | 73 * 42 + 42 * 27 = | | 19) ( 27 + 73) * 42 = 4200 |
| 20) | 237 * 34 - 34 * 37 = | | 20) ( 237 - 37) * 34 = 6800 |
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Score: ______________ | |
