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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Thursday April 16 2026
01:58:36 AM | Thursday April 16 2026
01:58:36 AMFlip Answers |
| 1) | 101 * 99 = | | 1) 100 * 100 - 1 * 1 = 9999 |
| 2) | 308 * 292 = | | 2) 300 * 300 - 8 * 8 = 89936 |
| 3) | 299 * 301 = | | 3) 300 * 300 - 1 * 1 = 89999 |
| 4) | 106 * 94 = | | 4) 100 * 100 - 6 * 6 = 9964 |
| 5) | 299 * 301 = | | 5) 300 * 300 - 1 * 1 = 89999 |
| 6) | 192 * 208 = | | 6) 200 * 200 - 8 * 8 = 39936 |
| 7) | 404 * 396 = | | 7) 400 * 400 - 4 * 4 = 159984 |
| 8) | 301 * 299 = | | 8) 300 * 300 - 1 * 1 = 89999 |
| 9) | 103 * 97 = | | 9) 100 * 100 - 3 * 3 = 9991 |
| 10) | 308 * 292 = | | 10) 300 * 300 - 8 * 8 = 89936 |
| 11) | 83 * 49 + 51 * 83 = | | 11) ( 49 + 51) * 83 = 8300 |
| 12) | 37 * 39 + 39 * 63 = | | 12) ( 37 + 63) * 39 = 3900 |
| 13) | 61 * 59 + 61 * 41 = | | 13) ( 41 + 59) * 61 = 6100 |
| 14) | 53 * 29 + 29 * 47 = | | 14) ( 53 + 47) * 29 = 2900 |
| 15) | 34 * 54 + 46 * 34 = | | 15) ( 46 + 54) * 34 = 3400 |
| 16) | 43 * 80 + 80 * 157 = | | 16) ( 157 + 43) * 80 = 16000 |
| 17) | 87 * 135 - 87 * 35 = | | 17) ( 135 - 35) * 87 = 8700 |
| 18) | 45 * 269 - 69 * 45 = | | 18) ( 269 - 69) * 45 = 9000 |
| 19) | 165 * 97 - 65 * 97 = | | 19) ( 165 - 65) * 97 = 9700 |
| 20) | 245 * 66 - 45 * 66 = | | 20) ( 245 - 45) * 66 = 13200 |
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Score: ______________ | |
