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 December 10 2025
12:46:57 AM | Wednesday December 10 2025
12:46:57 AMFlip Answers |
| 1) | 192 * 208 = | | 1) 200 * 200 - 8 * 8 = 39936 |
| 2) | 194 * 206 = | | 2) 200 * 200 - 6 * 6 = 39964 |
| 3) | 106 * 94 = | | 3) 100 * 100 - 6 * 6 = 9964 |
| 4) | 406 * 394 = | | 4) 400 * 400 - 6 * 6 = 159964 |
| 5) | 108 * 92 = | | 5) 100 * 100 - 8 * 8 = 9936 |
| 6) | 194 * 206 = | | 6) 200 * 200 - 6 * 6 = 39964 |
| 7) | 202 * 198 = | | 7) 200 * 200 - 2 * 2 = 39996 |
| 8) | 306 * 294 = | | 8) 300 * 300 - 6 * 6 = 89964 |
| 9) | 294 * 306 = | | 9) 300 * 300 - 6 * 6 = 89964 |
| 10) | 394 * 406 = | | 10) 400 * 400 - 6 * 6 = 159964 |
| 11) | 142 * 52 - 42 * 52 = | | 11) ( 142 - 42) * 52 = 5200 |
| 12) | 62 * 261 - 61 * 62 = | | 12) ( 261 - 61) * 62 = 12400 |
| 13) | 75 * 167 - 75 * 67 = | | 13) ( 167 - 67) * 75 = 7500 |
| 14) | 235 * 91 - 91 * 35 = | | 14) ( 235 - 35) * 91 = 18200 |
| 15) | 156 * 38 - 38 * 56 = | | 15) ( 156 - 56) * 38 = 3800 |
| 16) | 30 * 61 + 30 * 39 = | | 16) ( 39 + 61) * 30 = 3000 |
| 17) | 150 * 58 - 58 * 50 = | | 17) ( 150 - 50) * 58 = 5800 |
| 18) | 148 * 46 - 48 * 46 = | | 18) ( 148 - 48) * 46 = 4600 |
| 19) | 250 * 76 - 76 * 50 = | | 19) ( 250 - 50) * 76 = 15200 |
| 20) | 25 * 35 + 65 * 25 = | | 20) ( 35 + 65) * 25 = 2500 |
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Score: ______________ | |
