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 May 22 2026
07:39:04 PM | Friday May 22 2026
07:39:04 PMFlip Answers |
| 1) | 194 * 206 = | | 1) 200 * 200 - 6 * 6 = 39964 |
| 2) | 408 * 392 = | | 2) 400 * 400 - 8 * 8 = 159936 |
| 3) | 401 * 399 = | | 3) 400 * 400 - 1 * 1 = 159999 |
| 4) | 96 * 104 = | | 4) 100 * 100 - 4 * 4 = 9984 |
| 5) | 93 * 107 = | | 5) 100 * 100 - 7 * 7 = 9951 |
| 6) | 407 * 393 = | | 6) 400 * 400 - 7 * 7 = 159951 |
| 7) | 99 * 101 = | | 7) 100 * 100 - 1 * 1 = 9999 |
| 8) | 394 * 406 = | | 8) 400 * 400 - 6 * 6 = 159964 |
| 9) | 94 * 106 = | | 9) 100 * 100 - 6 * 6 = 9964 |
| 10) | 201 * 199 = | | 10) 200 * 200 - 1 * 1 = 39999 |
| 11) | 74 * 154 - 74 * 54 = | | 11) ( 154 - 54) * 74 = 7400 |
| 12) | 95 * 263 - 95 * 63 = | | 12) ( 263 - 63) * 95 = 19000 |
| 13) | 73 * 58 + 27 * 58 = | | 13) ( 27 + 73) * 58 = 5800 |
| 14) | 68 * 165 - 65 * 68 = | | 14) ( 165 - 65) * 68 = 6800 |
| 15) | 26 * 32 + 32 * 74 = | | 15) ( 26 + 74) * 32 = 3200 |
| 16) | 51 * 37 + 149 * 37 = | | 16) ( 149 + 51) * 37 = 7400 |
| 17) | 93 * 63 + 37 * 93 = | | 17) ( 37 + 63) * 93 = 9300 |
| 18) | 87 * 67 + 33 * 87 = | | 18) ( 33 + 67) * 87 = 8700 |
| 19) | 168 * 88 - 88 * 68 = | | 19) ( 168 - 68) * 88 = 8800 |
| 20) | 74 * 83 + 26 * 83 = | | 20) ( 26 + 74) * 83 = 8300 |
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Score: ______________ | |
