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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Saturday May 02 2026
01:06:17 AM | Saturday May 02 2026
01:06:17 AMFlip Answers |
| 1) | 308 * 292 = | | 1) 300 * 300 - 8 * 8 = 89936 |
| 2) | 293 * 307 = | | 2) 300 * 300 - 7 * 7 = 89951 |
| 3) | 299 * 301 = | | 3) 300 * 300 - 1 * 1 = 89999 |
| 4) | 208 * 192 = | | 4) 200 * 200 - 8 * 8 = 39936 |
| 5) | 101 * 99 = | | 5) 100 * 100 - 1 * 1 = 9999 |
| 6) | 199 * 201 = | | 6) 200 * 200 - 1 * 1 = 39999 |
| 7) | 294 * 306 = | | 7) 300 * 300 - 6 * 6 = 89964 |
| 8) | 192 * 208 = | | 8) 200 * 200 - 8 * 8 = 39936 |
| 9) | 92 * 108 = | | 9) 100 * 100 - 8 * 8 = 9936 |
| 10) | 406 * 394 = | | 10) 400 * 400 - 6 * 6 = 159964 |
| 11) | 25 * 36 + 64 * 25 = | | 11) ( 36 + 64) * 25 = 2500 |
| 12) | 74 * 44 + 74 * 56 = | | 12) ( 44 + 56) * 74 = 7400 |
| 13) | 66 * 164 + 66 * 36 = | | 13) ( 164 + 36) * 66 = 13200 |
| 14) | 136 * 30 - 30 * 36 = | | 14) ( 136 - 36) * 30 = 3000 |
| 15) | 162 * 29 + 29 * 38 = | | 15) ( 162 + 38) * 29 = 5800 |
| 16) | 91 * 160 + 91 * 40 = | | 16) ( 160 + 40) * 91 = 18200 |
| 17) | 126 * 94 + 94 * 74 = | | 17) ( 126 + 74) * 94 = 18800 |
| 18) | 173 * 62 - 62 * 73 = | | 18) ( 173 - 73) * 62 = 6200 |
| 19) | 67 * 250 - 67 * 50 = | | 19) ( 250 - 50) * 67 = 13400 |
| 20) | 51 * 174 - 51 * 74 = | | 20) ( 174 - 74) * 51 = 5100 |
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Score: ______________ | |
