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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Monday February 09 2026
01:53:04 AM | Monday February 09 2026
01:53:04 AMFlip Answers |
| 1) | 302 * 298 = | | 1) 300 * 300 - 2 * 2 = 89996 |
| 2) | 299 * 301 = | | 2) 300 * 300 - 1 * 1 = 89999 |
| 3) | 199 * 201 = | | 3) 200 * 200 - 1 * 1 = 39999 |
| 4) | 303 * 297 = | | 4) 300 * 300 - 3 * 3 = 89991 |
| 5) | 205 * 195 = | | 5) 200 * 200 - 5 * 5 = 39975 |
| 6) | 95 * 105 = | | 6) 100 * 100 - 5 * 5 = 9975 |
| 7) | 92 * 108 = | | 7) 100 * 100 - 8 * 8 = 9936 |
| 8) | 104 * 96 = | | 8) 100 * 100 - 4 * 4 = 9984 |
| 9) | 307 * 293 = | | 9) 300 * 300 - 7 * 7 = 89951 |
| 10) | 290 * 310 = | | 10) 300 * 300 - 10 * 10 = 89900 |
| 11) | 70 * 151 + 49 * 70 = | | 11) ( 151 + 49) * 70 = 14000 |
| 12) | 273 * 62 - 73 * 62 = | | 12) ( 273 - 73) * 62 = 12400 |
| 13) | 82 * 155 - 55 * 82 = | | 13) ( 155 - 55) * 82 = 8200 |
| 14) | 157 * 90 - 90 * 57 = | | 14) ( 157 - 57) * 90 = 9000 |
| 15) | 51 * 173 - 51 * 73 = | | 15) ( 173 - 73) * 51 = 5100 |
| 16) | 155 * 41 - 41 * 55 = | | 16) ( 155 - 55) * 41 = 4100 |
| 17) | 55 * 245 - 45 * 55 = | | 17) ( 245 - 45) * 55 = 11000 |
| 18) | 89 * 58 + 142 * 89 = | | 18) ( 142 + 58) * 89 = 17800 |
| 19) | 34 * 48 + 34 * 52 = | | 19) ( 48 + 52) * 34 = 3400 |
| 20) | 44 * 167 - 67 * 44 = | | 20) ( 167 - 67) * 44 = 4400 |
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Score: ______________ | |
