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 April 22 2026
10:34:32 PM | Wednesday April 22 2026
10:34:32 PMFlip Answers |
| 1) | 298 * 302 = | | 1) 300 * 300 - 2 * 2 = 89996 |
| 2) | 194 * 206 = | | 2) 200 * 200 - 6 * 6 = 39964 |
| 3) | 309 * 291 = | | 3) 300 * 300 - 9 * 9 = 89919 |
| 4) | 190 * 210 = | | 4) 200 * 200 - 10 * 10 = 39900 |
| 5) | 199 * 201 = | | 5) 200 * 200 - 1 * 1 = 39999 |
| 6) | 294 * 306 = | | 6) 300 * 300 - 6 * 6 = 89964 |
| 7) | 307 * 293 = | | 7) 300 * 300 - 7 * 7 = 89951 |
| 8) | 205 * 195 = | | 8) 200 * 200 - 5 * 5 = 39975 |
| 9) | 195 * 205 = | | 9) 200 * 200 - 5 * 5 = 39975 |
| 10) | 208 * 192 = | | 10) 200 * 200 - 8 * 8 = 39936 |
| 11) | 32 * 261 - 32 * 61 = | | 11) ( 261 - 61) * 32 = 6400 |
| 12) | 51 * 77 + 149 * 77 = | | 12) ( 149 + 51) * 77 = 15400 |
| 13) | 250 * 56 - 50 * 56 = | | 13) ( 250 - 50) * 56 = 11200 |
| 14) | 96 * 53 + 96 * 47 = | | 14) ( 53 + 47) * 96 = 9600 |
| 15) | 236 * 93 - 93 * 36 = | | 15) ( 236 - 36) * 93 = 18600 |
| 16) | 259 * 27 - 27 * 59 = | | 16) ( 259 - 59) * 27 = 5400 |
| 17) | 81 * 52 + 48 * 81 = | | 17) ( 52 + 48) * 81 = 8100 |
| 18) | 92 * 150 + 50 * 92 = | | 18) ( 150 + 50) * 92 = 18400 |
| 19) | 41 * 63 + 41 * 37 = | | 19) ( 37 + 63) * 41 = 4100 |
| 20) | 31 * 173 - 31 * 73 = | | 20) ( 173 - 73) * 31 = 3100 |
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Score: ______________ | |
