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 March 13 2026
11:31:10 PM | Friday March 13 2026
11:31:10 PMFlip Answers |
| 1) | 296 * 304 = | | 1) 300 * 300 - 4 * 4 = 89984 |
| 2) | 307 * 293 = | | 2) 300 * 300 - 7 * 7 = 89951 |
| 3) | 193 * 207 = | | 3) 200 * 200 - 7 * 7 = 39951 |
| 4) | 199 * 201 = | | 4) 200 * 200 - 1 * 1 = 39999 |
| 5) | 190 * 210 = | | 5) 200 * 200 - 10 * 10 = 39900 |
| 6) | 309 * 291 = | | 6) 300 * 300 - 9 * 9 = 89919 |
| 7) | 301 * 299 = | | 7) 300 * 300 - 1 * 1 = 89999 |
| 8) | 102 * 98 = | | 8) 100 * 100 - 2 * 2 = 9996 |
| 9) | 404 * 396 = | | 9) 400 * 400 - 4 * 4 = 159984 |
| 10) | 394 * 406 = | | 10) 400 * 400 - 6 * 6 = 159964 |
| 11) | 36 * 91 + 91 * 64 = | | 11) ( 36 + 64) * 91 = 9100 |
| 12) | 68 * 58 + 32 * 58 = | | 12) ( 32 + 68) * 58 = 5800 |
| 13) | 32 * 161 + 39 * 32 = | | 13) ( 161 + 39) * 32 = 6400 |
| 14) | 85 * 54 + 85 * 46 = | | 14) ( 46 + 54) * 85 = 8500 |
| 15) | 262 * 93 - 93 * 62 = | | 15) ( 262 - 62) * 93 = 18600 |
| 16) | 36 * 36 + 64 * 36 = | | 16) ( 64 + 36) * 36 = 3600 |
| 17) | 76 * 132 + 76 * 68 = | | 17) ( 132 + 68) * 76 = 15200 |
| 18) | 61 * 150 - 61 * 50 = | | 18) ( 150 - 50) * 61 = 6100 |
| 19) | 51 * 75 + 75 * 149 = | | 19) ( 149 + 51) * 75 = 15000 |
| 20) | 246 * 75 - 46 * 75 = | | 20) ( 246 - 46) * 75 = 15000 |
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Score: ______________ | |
