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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Tuesday February 24 2026
12:24:00 AM | Tuesday February 24 2026
12:24:00 AMFlip Answers |
| 1) | 90 * 110 = | | 1) 100 * 100 - 10 * 10 = 9900 |
| 2) | 195 * 205 = | | 2) 200 * 200 - 5 * 5 = 39975 |
| 3) | 94 * 106 = | | 3) 100 * 100 - 6 * 6 = 9964 |
| 4) | 294 * 306 = | | 4) 300 * 300 - 6 * 6 = 89964 |
| 5) | 398 * 402 = | | 5) 400 * 400 - 2 * 2 = 159996 |
| 6) | 394 * 406 = | | 6) 400 * 400 - 6 * 6 = 159964 |
| 7) | 308 * 292 = | | 7) 300 * 300 - 8 * 8 = 89936 |
| 8) | 103 * 97 = | | 8) 100 * 100 - 3 * 3 = 9991 |
| 9) | 207 * 193 = | | 9) 200 * 200 - 7 * 7 = 39951 |
| 10) | 90 * 110 = | | 10) 100 * 100 - 10 * 10 = 9900 |
| 11) | 69 * 271 - 71 * 69 = | | 11) ( 271 - 71) * 69 = 13800 |
| 12) | 45 * 125 + 75 * 45 = | | 12) ( 125 + 75) * 45 = 9000 |
| 13) | 82 * 42 + 82 * 158 = | | 13) ( 158 + 42) * 82 = 16400 |
| 14) | 75 * 161 - 61 * 75 = | | 14) ( 161 - 61) * 75 = 7500 |
| 15) | 258 * 97 - 97 * 58 = | | 15) ( 258 - 58) * 97 = 19400 |
| 16) | 73 * 62 + 62 * 127 = | | 16) ( 127 + 73) * 62 = 12400 |
| 17) | 241 * 33 - 33 * 41 = | | 17) ( 241 - 41) * 33 = 6600 |
| 18) | 57 * 244 - 44 * 57 = | | 18) ( 244 - 44) * 57 = 11400 |
| 19) | 75 * 36 + 64 * 75 = | | 19) ( 36 + 64) * 75 = 7500 |
| 20) | 34 * 269 - 69 * 34 = | | 20) ( 269 - 69) * 34 = 6800 |
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Score: ______________ | |
