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 February 13 2026
11:57:21 AM | Friday February 13 2026
11:57:21 AMFlip Answers |
| 1) | 190 * 210 = | | 1) 200 * 200 - 10 * 10 = 39900 |
| 2) | 303 * 297 = | | 2) 300 * 300 - 3 * 3 = 89991 |
| 3) | 293 * 307 = | | 3) 300 * 300 - 7 * 7 = 89951 |
| 4) | 104 * 96 = | | 4) 100 * 100 - 4 * 4 = 9984 |
| 5) | 92 * 108 = | | 5) 100 * 100 - 8 * 8 = 9936 |
| 6) | 293 * 307 = | | 6) 300 * 300 - 7 * 7 = 89951 |
| 7) | 293 * 307 = | | 7) 300 * 300 - 7 * 7 = 89951 |
| 8) | 110 * 90 = | | 8) 100 * 100 - 10 * 10 = 9900 |
| 9) | 192 * 208 = | | 9) 200 * 200 - 8 * 8 = 39936 |
| 10) | 107 * 93 = | | 10) 100 * 100 - 7 * 7 = 9951 |
| 11) | 68 * 149 - 68 * 49 = | | 11) ( 149 - 49) * 68 = 6800 |
| 12) | 235 * 34 - 35 * 34 = | | 12) ( 235 - 35) * 34 = 6800 |
| 13) | 23 * 151 - 51 * 23 = | | 13) ( 151 - 51) * 23 = 2300 |
| 14) | 246 * 92 - 92 * 46 = | | 14) ( 246 - 46) * 92 = 18400 |
| 15) | 55 * 272 - 55 * 72 = | | 15) ( 272 - 72) * 55 = 11000 |
| 16) | 156 * 86 + 86 * 44 = | | 16) ( 156 + 44) * 86 = 17200 |
| 17) | 145 * 64 - 64 * 45 = | | 17) ( 145 - 45) * 64 = 6400 |
| 18) | 160 * 53 - 53 * 60 = | | 18) ( 160 - 60) * 53 = 5300 |
| 19) | 47 * 164 - 47 * 64 = | | 19) ( 164 - 64) * 47 = 4700 |
| 20) | 65 * 49 + 35 * 49 = | | 20) ( 35 + 65) * 49 = 4900 |
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Score: ______________ | |
