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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Monday June 16 2025
07:09:43 PM | Monday June 16 2025
07:09:43 PMFlip Answers |
| 1) | 298 * 302 = | | 1) 300 * 300 - 2 * 2 = 89996 |
| 2) | 304 * 296 = | | 2) 300 * 300 - 4 * 4 = 89984 |
| 3) | 403 * 397 = | | 3) 400 * 400 - 3 * 3 = 159991 |
| 4) | 92 * 108 = | | 4) 100 * 100 - 8 * 8 = 9936 |
| 5) | 410 * 390 = | | 5) 400 * 400 - 10 * 10 = 159900 |
| 6) | 196 * 204 = | | 6) 200 * 200 - 4 * 4 = 39984 |
| 7) | 96 * 104 = | | 7) 100 * 100 - 4 * 4 = 9984 |
| 8) | 205 * 195 = | | 8) 200 * 200 - 5 * 5 = 39975 |
| 9) | 194 * 206 = | | 9) 200 * 200 - 6 * 6 = 39964 |
| 10) | 206 * 194 = | | 10) 200 * 200 - 6 * 6 = 39964 |
| 11) | 54 * 241 - 41 * 54 = | | 11) ( 241 - 41) * 54 = 10800 |
| 12) | 164 * 90 - 90 * 64 = | | 12) ( 164 - 64) * 90 = 9000 |
| 13) | 57 * 67 + 43 * 67 = | | 13) ( 57 + 43) * 67 = 6700 |
| 14) | 30 * 51 + 30 * 49 = | | 14) ( 49 + 51) * 30 = 3000 |
| 15) | 56 * 256 - 56 * 56 = | | 15) ( 256 - 56) * 56 = 11200 |
| 16) | 41 * 75 + 75 * 59 = | | 16) ( 41 + 59) * 75 = 7500 |
| 17) | 50 * 237 - 37 * 50 = | | 17) ( 237 - 37) * 50 = 10000 |
| 18) | 96 * 127 + 96 * 73 = | | 18) ( 127 + 73) * 96 = 19200 |
| 19) | 172 * 79 - 72 * 79 = | | 19) ( 172 - 72) * 79 = 7900 |
| 20) | 58 * 41 + 58 * 159 = | | 20) ( 159 + 41) * 58 = 11600 |
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Score: ______________ | |
