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 March 16 2026
02:09:41 PM | Monday March 16 2026
02:09:41 PMFlip Answers |
| 1) | 206 * 194 = | | 1) 200 * 200 - 6 * 6 = 39964 |
| 2) | 95 * 105 = | | 2) 100 * 100 - 5 * 5 = 9975 |
| 3) | 306 * 294 = | | 3) 300 * 300 - 6 * 6 = 89964 |
| 4) | 198 * 202 = | | 4) 200 * 200 - 2 * 2 = 39996 |
| 5) | 106 * 94 = | | 5) 100 * 100 - 6 * 6 = 9964 |
| 6) | 208 * 192 = | | 6) 200 * 200 - 8 * 8 = 39936 |
| 7) | 304 * 296 = | | 7) 300 * 300 - 4 * 4 = 89984 |
| 8) | 298 * 302 = | | 8) 300 * 300 - 2 * 2 = 89996 |
| 9) | 92 * 108 = | | 9) 100 * 100 - 8 * 8 = 9936 |
| 10) | 396 * 404 = | | 10) 400 * 400 - 4 * 4 = 159984 |
| 11) | 66 * 36 + 66 * 164 = | | 11) ( 164 + 36) * 66 = 13200 |
| 12) | 43 * 39 + 61 * 43 = | | 12) ( 39 + 61) * 43 = 4300 |
| 13) | 145 * 22 + 22 * 55 = | | 13) ( 145 + 55) * 22 = 4400 |
| 14) | 90 * 64 + 36 * 90 = | | 14) ( 64 + 36) * 90 = 9000 |
| 15) | 237 * 48 - 48 * 37 = | | 15) ( 237 - 37) * 48 = 9600 |
| 16) | 67 * 52 + 67 * 48 = | | 16) ( 48 + 52) * 67 = 6700 |
| 17) | 47 * 140 - 40 * 47 = | | 17) ( 140 - 40) * 47 = 4700 |
| 18) | 241 * 45 - 45 * 41 = | | 18) ( 241 - 41) * 45 = 9000 |
| 19) | 94 * 247 - 47 * 94 = | | 19) ( 247 - 47) * 94 = 18800 |
| 20) | 28 * 141 + 28 * 59 = | | 20) ( 141 + 59) * 28 = 5600 |
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Score: ______________ | |
