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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Saturday February 07 2026
06:01:48 AM | Saturday February 07 2026
06:01:48 AMFlip Answers |
| 1) | 106 * 94 = | | 1) 100 * 100 - 6 * 6 = 9964 |
| 2) | 297 * 303 = | | 2) 300 * 300 - 3 * 3 = 89991 |
| 3) | 308 * 292 = | | 3) 300 * 300 - 8 * 8 = 89936 |
| 4) | 295 * 305 = | | 4) 300 * 300 - 5 * 5 = 89975 |
| 5) | 107 * 93 = | | 5) 100 * 100 - 7 * 7 = 9951 |
| 6) | 394 * 406 = | | 6) 400 * 400 - 6 * 6 = 159964 |
| 7) | 296 * 304 = | | 7) 300 * 300 - 4 * 4 = 89984 |
| 8) | 90 * 110 = | | 8) 100 * 100 - 10 * 10 = 9900 |
| 9) | 304 * 296 = | | 9) 300 * 300 - 4 * 4 = 89984 |
| 10) | 396 * 404 = | | 10) 400 * 400 - 4 * 4 = 159984 |
| 11) | 86 * 56 + 86 * 44 = | | 11) ( 56 + 44) * 86 = 8600 |
| 12) | 96 * 145 - 96 * 45 = | | 12) ( 145 - 45) * 96 = 9600 |
| 13) | 97 * 251 - 51 * 97 = | | 13) ( 251 - 51) * 97 = 19400 |
| 14) | 56 * 76 + 144 * 76 = | | 14) ( 144 + 56) * 76 = 15200 |
| 15) | 25 * 152 - 25 * 52 = | | 15) ( 152 - 52) * 25 = 2500 |
| 16) | 157 * 63 - 63 * 57 = | | 16) ( 157 - 57) * 63 = 6300 |
| 17) | 69 * 143 + 57 * 69 = | | 17) ( 143 + 57) * 69 = 13800 |
| 18) | 62 * 157 + 62 * 43 = | | 18) ( 157 + 43) * 62 = 12400 |
| 19) | 62 * 162 - 62 * 62 = | | 19) ( 162 - 62) * 62 = 6200 |
| 20) | 89 * 37 + 63 * 89 = | | 20) ( 63 + 37) * 89 = 8900 |
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Score: ______________ | |
