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 October 19 2026
12:51:03 AM | Monday October 19 2026
12:51:03 AMFlip Answers |
| 1) | 204 * 196 = | | 1) 200 * 200 - 4 * 4 = 39984 |
| 2) | 291 * 309 = | | 2) 300 * 300 - 9 * 9 = 89919 |
| 3) | 306 * 294 = | | 3) 300 * 300 - 6 * 6 = 89964 |
| 4) | 302 * 298 = | | 4) 300 * 300 - 2 * 2 = 89996 |
| 5) | 210 * 190 = | | 5) 200 * 200 - 10 * 10 = 39900 |
| 6) | 295 * 305 = | | 6) 300 * 300 - 5 * 5 = 89975 |
| 7) | 209 * 191 = | | 7) 200 * 200 - 9 * 9 = 39919 |
| 8) | 94 * 106 = | | 8) 100 * 100 - 6 * 6 = 9964 |
| 9) | 403 * 397 = | | 9) 400 * 400 - 3 * 3 = 159991 |
| 10) | 206 * 194 = | | 10) 200 * 200 - 6 * 6 = 39964 |
| 11) | 256 * 81 - 81 * 56 = | | 11) ( 256 - 56) * 81 = 16200 |
| 12) | 165 * 34 - 65 * 34 = | | 12) ( 165 - 65) * 34 = 3400 |
| 13) | 245 * 75 - 75 * 45 = | | 13) ( 245 - 45) * 75 = 15000 |
| 14) | 91 * 64 + 136 * 91 = | | 14) ( 136 + 64) * 91 = 18200 |
| 15) | 58 * 168 - 68 * 58 = | | 15) ( 168 - 68) * 58 = 5800 |
| 16) | 61 * 46 + 39 * 46 = | | 16) ( 39 + 61) * 46 = 4600 |
| 17) | 87 * 262 - 87 * 62 = | | 17) ( 262 - 62) * 87 = 17400 |
| 18) | 27 * 96 + 96 * 73 = | | 18) ( 27 + 73) * 96 = 9600 |
| 19) | 96 * 148 - 96 * 48 = | | 19) ( 148 - 48) * 96 = 9600 |
| 20) | 41 * 53 + 53 * 59 = | | 20) ( 41 + 59) * 53 = 5300 |
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Score: ______________ | |
