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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Thursday November 13 2025
02:49:50 AM | Thursday November 13 2025
02:49:50 AMFlip Answers |
| 1) | 403 * 397 = | | 1) 400 * 400 - 3 * 3 = 159991 |
| 2) | 99 * 101 = | | 2) 100 * 100 - 1 * 1 = 9999 |
| 3) | 301 * 299 = | | 3) 300 * 300 - 1 * 1 = 89999 |
| 4) | 192 * 208 = | | 4) 200 * 200 - 8 * 8 = 39936 |
| 5) | 101 * 99 = | | 5) 100 * 100 - 1 * 1 = 9999 |
| 6) | 204 * 196 = | | 6) 200 * 200 - 4 * 4 = 39984 |
| 7) | 203 * 197 = | | 7) 200 * 200 - 3 * 3 = 39991 |
| 8) | 298 * 302 = | | 8) 300 * 300 - 2 * 2 = 89996 |
| 9) | 99 * 101 = | | 9) 100 * 100 - 1 * 1 = 9999 |
| 10) | 292 * 308 = | | 10) 300 * 300 - 8 * 8 = 89936 |
| 11) | 37 * 46 + 63 * 46 = | | 11) ( 63 + 37) * 46 = 4600 |
| 12) | 80 * 252 - 52 * 80 = | | 12) ( 252 - 52) * 80 = 16000 |
| 13) | 73 * 145 - 45 * 73 = | | 13) ( 145 - 45) * 73 = 7300 |
| 14) | 95 * 134 + 95 * 66 = | | 14) ( 134 + 66) * 95 = 19000 |
| 15) | 165 * 21 - 21 * 65 = | | 15) ( 165 - 65) * 21 = 2100 |
| 16) | 249 * 95 - 95 * 49 = | | 16) ( 249 - 49) * 95 = 19000 |
| 17) | 76 * 164 - 76 * 64 = | | 17) ( 164 - 64) * 76 = 7600 |
| 18) | 47 * 66 + 66 * 153 = | | 18) ( 153 + 47) * 66 = 13200 |
| 19) | 88 * 68 + 132 * 88 = | | 19) ( 132 + 68) * 88 = 17600 |
| 20) | 97 * 174 - 97 * 74 = | | 20) ( 174 - 74) * 97 = 9700 |
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Score: ______________ | |
