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 29 2026
04:00:40 PM | Monday June 29 2026
04:00:40 PMFlip Answers |
| 1) | 295 * 305 = | | 1) 300 * 300 - 5 * 5 = 89975 |
| 2) | 194 * 206 = | | 2) 200 * 200 - 6 * 6 = 39964 |
| 3) | 209 * 191 = | | 3) 200 * 200 - 9 * 9 = 39919 |
| 4) | 90 * 110 = | | 4) 100 * 100 - 10 * 10 = 9900 |
| 5) | 93 * 107 = | | 5) 100 * 100 - 7 * 7 = 9951 |
| 6) | 105 * 95 = | | 6) 100 * 100 - 5 * 5 = 9975 |
| 7) | 203 * 197 = | | 7) 200 * 200 - 3 * 3 = 39991 |
| 8) | 396 * 404 = | | 8) 400 * 400 - 4 * 4 = 159984 |
| 9) | 204 * 196 = | | 9) 200 * 200 - 4 * 4 = 39984 |
| 10) | 93 * 107 = | | 10) 100 * 100 - 7 * 7 = 9951 |
| 11) | 45 * 140 + 45 * 60 = | | 11) ( 140 + 60) * 45 = 9000 |
| 12) | 43 * 34 + 43 * 66 = | | 12) ( 34 + 66) * 43 = 4300 |
| 13) | 65 * 80 + 80 * 35 = | | 13) ( 65 + 35) * 80 = 8000 |
| 14) | 238 * 39 - 39 * 38 = | | 14) ( 238 - 38) * 39 = 7800 |
| 15) | 73 * 66 + 27 * 66 = | | 15) ( 27 + 73) * 66 = 6600 |
| 16) | 83 * 166 - 83 * 66 = | | 16) ( 166 - 66) * 83 = 8300 |
| 17) | 50 * 93 + 50 * 93 = | | 17) ( 50 + 50) * 93 = 9300 |
| 18) | 47 * 62 + 62 * 53 = | | 18) ( 53 + 47) * 62 = 6200 |
| 19) | 44 * 166 - 66 * 44 = | | 19) ( 166 - 66) * 44 = 4400 |
| 20) | 26 * 45 + 155 * 26 = | | 20) ( 155 + 45) * 26 = 5200 |
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Score: ______________ | |
