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 July 10 2026
04:47:26 AM | Friday July 10 2026
04:47:26 AMFlip Answers |
| 1) | 108 * 92 = | | 1) 100 * 100 - 8 * 8 = 9936 |
| 2) | 305 * 295 = | | 2) 300 * 300 - 5 * 5 = 89975 |
| 3) | 195 * 205 = | | 3) 200 * 200 - 5 * 5 = 39975 |
| 4) | 95 * 105 = | | 4) 100 * 100 - 5 * 5 = 9975 |
| 5) | 302 * 298 = | | 5) 300 * 300 - 2 * 2 = 89996 |
| 6) | 98 * 102 = | | 6) 100 * 100 - 2 * 2 = 9996 |
| 7) | 196 * 204 = | | 7) 200 * 200 - 4 * 4 = 39984 |
| 8) | 296 * 304 = | | 8) 300 * 300 - 4 * 4 = 89984 |
| 9) | 307 * 293 = | | 9) 300 * 300 - 7 * 7 = 89951 |
| 10) | 403 * 397 = | | 10) 400 * 400 - 3 * 3 = 159991 |
| 11) | 62 * 129 + 71 * 62 = | | 11) ( 129 + 71) * 62 = 12400 |
| 12) | 42 * 144 - 42 * 44 = | | 12) ( 144 - 44) * 42 = 4200 |
| 13) | 39 * 25 + 25 * 61 = | | 13) ( 39 + 61) * 25 = 2500 |
| 14) | 69 * 76 + 76 * 31 = | | 14) ( 31 + 69) * 76 = 7600 |
| 15) | 83 * 259 - 59 * 83 = | | 15) ( 259 - 59) * 83 = 16600 |
| 16) | 48 * 146 + 48 * 54 = | | 16) ( 146 + 54) * 48 = 9600 |
| 17) | 88 * 162 - 62 * 88 = | | 17) ( 162 - 62) * 88 = 8800 |
| 18) | 34 * 79 + 66 * 79 = | | 18) ( 34 + 66) * 79 = 7900 |
| 19) | 148 * 45 + 52 * 45 = | | 19) ( 148 + 52) * 45 = 9000 |
| 20) | 35 * 94 + 94 * 65 = | | 20) ( 35 + 65) * 94 = 9400 |
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Score: ______________ | |
