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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Friday December 05 2025
11:30:02 PM | Friday December 05 2025
11:30:02 PMFlip Answers |
| 1) | 107 * 93 = | | 1) 100 * 100 - 7 * 7 = 9951 |
| 2) | 293 * 307 = | | 2) 300 * 300 - 7 * 7 = 89951 |
| 3) | 106 * 94 = | | 3) 100 * 100 - 6 * 6 = 9964 |
| 4) | 308 * 292 = | | 4) 300 * 300 - 8 * 8 = 89936 |
| 5) | 296 * 304 = | | 5) 300 * 300 - 4 * 4 = 89984 |
| 6) | 108 * 92 = | | 6) 100 * 100 - 8 * 8 = 9936 |
| 7) | 190 * 210 = | | 7) 200 * 200 - 10 * 10 = 39900 |
| 8) | 308 * 292 = | | 8) 300 * 300 - 8 * 8 = 89936 |
| 9) | 201 * 199 = | | 9) 200 * 200 - 1 * 1 = 39999 |
| 10) | 204 * 196 = | | 10) 200 * 200 - 4 * 4 = 39984 |
| 11) | 27 * 251 - 51 * 27 = | | 11) ( 251 - 51) * 27 = 5400 |
| 12) | 265 * 24 - 65 * 24 = | | 12) ( 265 - 65) * 24 = 4800 |
| 13) | 56 * 137 + 63 * 56 = | | 13) ( 137 + 63) * 56 = 11200 |
| 14) | 64 * 44 + 156 * 64 = | | 14) ( 156 + 44) * 64 = 12800 |
| 15) | 65 * 149 + 65 * 51 = | | 15) ( 149 + 51) * 65 = 13000 |
| 16) | 275 * 94 - 75 * 94 = | | 16) ( 275 - 75) * 94 = 18800 |
| 17) | 34 * 272 - 72 * 34 = | | 17) ( 272 - 72) * 34 = 6800 |
| 18) | 58 * 171 - 58 * 71 = | | 18) ( 171 - 71) * 58 = 5800 |
| 19) | 50 * 48 + 50 * 152 = | | 19) ( 152 + 48) * 50 = 10000 |
| 20) | 146 * 69 - 46 * 69 = | | 20) ( 146 - 46) * 69 = 6900 |
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Score: ______________ | |
