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 April 01 2026
02:44:18 AM | Wednesday April 01 2026
02:44:18 AMFlip Answers |
| 1) | 208 * 192 = | | 1) 200 * 200 - 8 * 8 = 39936 |
| 2) | 395 * 405 = | | 2) 400 * 400 - 5 * 5 = 159975 |
| 3) | 308 * 292 = | | 3) 300 * 300 - 8 * 8 = 89936 |
| 4) | 401 * 399 = | | 4) 400 * 400 - 1 * 1 = 159999 |
| 5) | 298 * 302 = | | 5) 300 * 300 - 2 * 2 = 89996 |
| 6) | 197 * 203 = | | 6) 200 * 200 - 3 * 3 = 39991 |
| 7) | 107 * 93 = | | 7) 100 * 100 - 7 * 7 = 9951 |
| 8) | 197 * 203 = | | 8) 200 * 200 - 3 * 3 = 39991 |
| 9) | 104 * 96 = | | 9) 100 * 100 - 4 * 4 = 9984 |
| 10) | 402 * 398 = | | 10) 400 * 400 - 2 * 2 = 159996 |
| 11) | 44 * 145 - 45 * 44 = | | 11) ( 145 - 45) * 44 = 4400 |
| 12) | 86 * 165 - 65 * 86 = | | 12) ( 165 - 65) * 86 = 8600 |
| 13) | 161 * 50 - 50 * 61 = | | 13) ( 161 - 61) * 50 = 5000 |
| 14) | 58 * 60 + 58 * 140 = | | 14) ( 140 + 60) * 58 = 11600 |
| 15) | 73 * 156 + 73 * 44 = | | 15) ( 156 + 44) * 73 = 14600 |
| 16) | 94 * 143 - 94 * 43 = | | 16) ( 143 - 43) * 94 = 9400 |
| 17) | 78 * 50 + 150 * 78 = | | 17) ( 150 + 50) * 78 = 15600 |
| 18) | 174 * 64 - 74 * 64 = | | 18) ( 174 - 74) * 64 = 6400 |
| 19) | 46 * 237 - 46 * 37 = | | 19) ( 237 - 37) * 46 = 9200 |
| 20) | 92 * 40 + 92 * 60 = | | 20) ( 40 + 60) * 92 = 9200 |
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Score: ______________ | |
