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 August 12 2026
02:38:06 PM | Wednesday August 12 2026
02:38:06 PMFlip Answers |
| 1) | 193 * 207 = | | 1) 200 * 200 - 7 * 7 = 39951 |
| 2) | 195 * 205 = | | 2) 200 * 200 - 5 * 5 = 39975 |
| 3) | 298 * 302 = | | 3) 300 * 300 - 2 * 2 = 89996 |
| 4) | 198 * 202 = | | 4) 200 * 200 - 2 * 2 = 39996 |
| 5) | 205 * 195 = | | 5) 200 * 200 - 5 * 5 = 39975 |
| 6) | 408 * 392 = | | 6) 400 * 400 - 8 * 8 = 159936 |
| 7) | 103 * 97 = | | 7) 100 * 100 - 3 * 3 = 9991 |
| 8) | 206 * 194 = | | 8) 200 * 200 - 6 * 6 = 39964 |
| 9) | 299 * 301 = | | 9) 300 * 300 - 1 * 1 = 89999 |
| 10) | 302 * 298 = | | 10) 300 * 300 - 2 * 2 = 89996 |
| 11) | 94 * 30 + 70 * 94 = | | 11) ( 30 + 70) * 94 = 9400 |
| 12) | 269 * 32 - 32 * 69 = | | 12) ( 269 - 69) * 32 = 6400 |
| 13) | 59 * 265 - 65 * 59 = | | 13) ( 265 - 65) * 59 = 11800 |
| 14) | 126 * 63 + 74 * 63 = | | 14) ( 126 + 74) * 63 = 12600 |
| 15) | 76 * 66 + 34 * 76 = | | 15) ( 34 + 66) * 76 = 7600 |
| 16) | 248 * 60 - 48 * 60 = | | 16) ( 248 - 48) * 60 = 12000 |
| 17) | 160 * 87 - 87 * 60 = | | 17) ( 160 - 60) * 87 = 8700 |
| 18) | 71 * 271 - 71 * 71 = | | 18) ( 271 - 71) * 71 = 14200 |
| 19) | 46 * 261 - 46 * 61 = | | 19) ( 261 - 61) * 46 = 9200 |
| 20) | 169 * 75 - 75 * 69 = | | 20) ( 169 - 69) * 75 = 7500 |
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Score: ______________ | |
