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 February 17 2026
06:07:04 PM | Tuesday February 17 2026
06:07:04 PMFlip Answers |
| 1) | 194 * 206 = | | 1) 200 * 200 - 6 * 6 = 39964 |
| 2) | 307 * 293 = | | 2) 300 * 300 - 7 * 7 = 89951 |
| 3) | 105 * 95 = | | 3) 100 * 100 - 5 * 5 = 9975 |
| 4) | 302 * 298 = | | 4) 300 * 300 - 2 * 2 = 89996 |
| 5) | 396 * 404 = | | 5) 400 * 400 - 4 * 4 = 159984 |
| 6) | 202 * 198 = | | 6) 200 * 200 - 2 * 2 = 39996 |
| 7) | 95 * 105 = | | 7) 100 * 100 - 5 * 5 = 9975 |
| 8) | 98 * 102 = | | 8) 100 * 100 - 2 * 2 = 9996 |
| 9) | 193 * 207 = | | 9) 200 * 200 - 7 * 7 = 39951 |
| 10) | 104 * 96 = | | 10) 100 * 100 - 4 * 4 = 9984 |
| 11) | 92 * 152 - 92 * 52 = | | 11) ( 152 - 52) * 92 = 9200 |
| 12) | 92 * 267 - 67 * 92 = | | 12) ( 267 - 67) * 92 = 18400 |
| 13) | 78 * 241 - 41 * 78 = | | 13) ( 241 - 41) * 78 = 15600 |
| 14) | 56 * 83 + 44 * 83 = | | 14) ( 56 + 44) * 83 = 8300 |
| 15) | 34 * 58 + 142 * 34 = | | 15) ( 142 + 58) * 34 = 6800 |
| 16) | 170 * 42 - 42 * 70 = | | 16) ( 170 - 70) * 42 = 4200 |
| 17) | 68 * 67 + 33 * 68 = | | 17) ( 33 + 67) * 68 = 6800 |
| 18) | 43 * 246 - 46 * 43 = | | 18) ( 246 - 46) * 43 = 8600 |
| 19) | 128 * 55 + 72 * 55 = | | 19) ( 128 + 72) * 55 = 11000 |
| 20) | 73 * 59 + 27 * 59 = | | 20) ( 27 + 73) * 59 = 5900 |
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Score: ______________ | |
