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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Wednesday October 07 2026
02:05:36 PM | Wednesday October 07 2026
02:05:36 PMFlip Answers |
| 1) | 196 * 204 = | | 1) 200 * 200 - 4 * 4 = 39984 |
| 2) | 306 * 294 = | | 2) 300 * 300 - 6 * 6 = 89964 |
| 3) | 101 * 99 = | | 3) 100 * 100 - 1 * 1 = 9999 |
| 4) | 195 * 205 = | | 4) 200 * 200 - 5 * 5 = 39975 |
| 5) | 406 * 394 = | | 5) 400 * 400 - 6 * 6 = 159964 |
| 6) | 304 * 296 = | | 6) 300 * 300 - 4 * 4 = 89984 |
| 7) | 407 * 393 = | | 7) 400 * 400 - 7 * 7 = 159951 |
| 8) | 305 * 295 = | | 8) 300 * 300 - 5 * 5 = 89975 |
| 9) | 93 * 107 = | | 9) 100 * 100 - 7 * 7 = 9951 |
| 10) | 92 * 108 = | | 10) 100 * 100 - 8 * 8 = 9936 |
| 11) | 28 * 247 - 47 * 28 = | | 11) ( 247 - 47) * 28 = 5600 |
| 12) | 257 * 78 - 57 * 78 = | | 12) ( 257 - 57) * 78 = 15600 |
| 13) | 69 * 58 + 131 * 58 = | | 13) ( 131 + 69) * 58 = 11600 |
| 14) | 93 * 71 + 129 * 93 = | | 14) ( 129 + 71) * 93 = 18600 |
| 15) | 153 * 55 + 47 * 55 = | | 15) ( 153 + 47) * 55 = 11000 |
| 16) | 156 * 43 - 56 * 43 = | | 16) ( 156 - 56) * 43 = 4300 |
| 17) | 94 * 269 - 69 * 94 = | | 17) ( 269 - 69) * 94 = 18800 |
| 18) | 35 * 67 + 35 * 133 = | | 18) ( 133 + 67) * 35 = 7000 |
| 19) | 273 * 61 - 61 * 73 = | | 19) ( 273 - 73) * 61 = 12200 |
| 20) | 253 * 93 - 53 * 93 = | | 20) ( 253 - 53) * 93 = 18600 |
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Score: ______________ | |
