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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Sunday July 06 2025
05:53:01 PM | Sunday July 06 2025
05:53:01 PMFlip Answers |
| 1) | 104 * 96 = | | 1) 100 * 100 - 4 * 4 = 9984 |
| 2) | 307 * 293 = | | 2) 300 * 300 - 7 * 7 = 89951 |
| 3) | 302 * 298 = | | 3) 300 * 300 - 2 * 2 = 89996 |
| 4) | 93 * 107 = | | 4) 100 * 100 - 7 * 7 = 9951 |
| 5) | 97 * 103 = | | 5) 100 * 100 - 3 * 3 = 9991 |
| 6) | 307 * 293 = | | 6) 300 * 300 - 7 * 7 = 89951 |
| 7) | 403 * 397 = | | 7) 400 * 400 - 3 * 3 = 159991 |
| 8) | 307 * 293 = | | 8) 300 * 300 - 7 * 7 = 89951 |
| 9) | 307 * 293 = | | 9) 300 * 300 - 7 * 7 = 89951 |
| 10) | 406 * 394 = | | 10) 400 * 400 - 6 * 6 = 159964 |
| 11) | 145 * 53 - 53 * 45 = | | 11) ( 145 - 45) * 53 = 5300 |
| 12) | 70 * 65 + 35 * 70 = | | 12) ( 65 + 35) * 70 = 7000 |
| 13) | 268 * 21 - 21 * 68 = | | 13) ( 268 - 68) * 21 = 4200 |
| 14) | 162 * 62 - 62 * 62 = | | 14) ( 162 - 62) * 62 = 6200 |
| 15) | 165 * 85 - 85 * 65 = | | 15) ( 165 - 65) * 85 = 8500 |
| 16) | 46 * 40 + 40 * 54 = | | 16) ( 46 + 54) * 40 = 4000 |
| 17) | 48 * 63 + 48 * 137 = | | 17) ( 137 + 63) * 48 = 9600 |
| 18) | 141 * 76 - 41 * 76 = | | 18) ( 141 - 41) * 76 = 7600 |
| 19) | 49 * 41 + 49 * 59 = | | 19) ( 59 + 41) * 49 = 4900 |
| 20) | 34 * 165 + 35 * 34 = | | 20) ( 165 + 35) * 34 = 6800 |
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Score: ______________ | |
