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 October 20 2026
01:40:44 AM | Tuesday October 20 2026
01:40:44 AMFlip Answers |
| 1) | 296 * 304 = | | 1) 300 * 300 - 4 * 4 = 89984 |
| 2) | 208 * 192 = | | 2) 200 * 200 - 8 * 8 = 39936 |
| 3) | 102 * 98 = | | 3) 100 * 100 - 2 * 2 = 9996 |
| 4) | 106 * 94 = | | 4) 100 * 100 - 6 * 6 = 9964 |
| 5) | 204 * 196 = | | 5) 200 * 200 - 4 * 4 = 39984 |
| 6) | 404 * 396 = | | 6) 400 * 400 - 4 * 4 = 159984 |
| 7) | 104 * 96 = | | 7) 100 * 100 - 4 * 4 = 9984 |
| 8) | 97 * 103 = | | 8) 100 * 100 - 3 * 3 = 9991 |
| 9) | 192 * 208 = | | 9) 200 * 200 - 8 * 8 = 39936 |
| 10) | 395 * 405 = | | 10) 400 * 400 - 5 * 5 = 159975 |
| 11) | 43 * 24 + 24 * 57 = | | 11) ( 57 + 43) * 24 = 2400 |
| 12) | 171 * 77 - 77 * 71 = | | 12) ( 171 - 71) * 77 = 7700 |
| 13) | 53 * 28 + 28 * 47 = | | 13) ( 47 + 53) * 28 = 2800 |
| 14) | 254 * 37 - 54 * 37 = | | 14) ( 254 - 54) * 37 = 7400 |
| 15) | 83 * 156 + 83 * 44 = | | 15) ( 156 + 44) * 83 = 16600 |
| 16) | 247 * 34 - 34 * 47 = | | 16) ( 247 - 47) * 34 = 6800 |
| 17) | 91 * 45 + 91 * 55 = | | 17) ( 55 + 45) * 91 = 9100 |
| 18) | 44 * 152 + 44 * 48 = | | 18) ( 152 + 48) * 44 = 8800 |
| 19) | 58 * 58 + 58 * 42 = | | 19) ( 42 + 58) * 58 = 5800 |
| 20) | 251 * 76 - 51 * 76 = | | 20) ( 251 - 51) * 76 = 15200 |
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Score: ______________ | |
