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 December 04 2025
06:41:25 PM | Thursday December 04 2025
06:41:25 PMFlip Answers |
| 1) | 202 * 198 = | | 1) 200 * 200 - 2 * 2 = 39996 |
| 2) | 193 * 207 = | | 2) 200 * 200 - 7 * 7 = 39951 |
| 3) | 205 * 195 = | | 3) 200 * 200 - 5 * 5 = 39975 |
| 4) | 104 * 96 = | | 4) 100 * 100 - 4 * 4 = 9984 |
| 5) | 196 * 204 = | | 5) 200 * 200 - 4 * 4 = 39984 |
| 6) | 298 * 302 = | | 6) 300 * 300 - 2 * 2 = 89996 |
| 7) | 309 * 291 = | | 7) 300 * 300 - 9 * 9 = 89919 |
| 8) | 193 * 207 = | | 8) 200 * 200 - 7 * 7 = 39951 |
| 9) | 204 * 196 = | | 9) 200 * 200 - 4 * 4 = 39984 |
| 10) | 91 * 109 = | | 10) 100 * 100 - 9 * 9 = 9919 |
| 11) | 58 * 54 + 58 * 46 = | | 11) ( 46 + 54) * 58 = 5800 |
| 12) | 82 * 47 + 153 * 82 = | | 12) ( 153 + 47) * 82 = 16400 |
| 13) | 56 * 71 + 144 * 71 = | | 13) ( 144 + 56) * 71 = 14200 |
| 14) | 62 * 250 - 62 * 50 = | | 14) ( 250 - 50) * 62 = 12400 |
| 15) | 56 * 73 + 73 * 44 = | | 15) ( 56 + 44) * 73 = 7300 |
| 16) | 175 * 25 - 75 * 25 = | | 16) ( 175 - 75) * 25 = 2500 |
| 17) | 41 * 86 + 86 * 59 = | | 17) ( 41 + 59) * 86 = 8600 |
| 18) | 235 * 70 - 35 * 70 = | | 18) ( 235 - 35) * 70 = 14000 |
| 19) | 148 * 94 + 94 * 52 = | | 19) ( 148 + 52) * 94 = 18800 |
| 20) | 53 * 74 + 26 * 53 = | | 20) ( 26 + 74) * 53 = 5300 |
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Score: ______________ | |
