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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Sunday June 21 2026
07:35:25 AM | Sunday June 21 2026
07:35:25 AMFlip Answers |
| 1) | 298 * 302 = | | 1) 300 * 300 - 2 * 2 = 89996 |
| 2) | 301 * 299 = | | 2) 300 * 300 - 1 * 1 = 89999 |
| 3) | 197 * 203 = | | 3) 200 * 200 - 3 * 3 = 39991 |
| 4) | 206 * 194 = | | 4) 200 * 200 - 6 * 6 = 39964 |
| 5) | 106 * 94 = | | 5) 100 * 100 - 6 * 6 = 9964 |
| 6) | 210 * 190 = | | 6) 200 * 200 - 10 * 10 = 39900 |
| 7) | 307 * 293 = | | 7) 300 * 300 - 7 * 7 = 89951 |
| 8) | 298 * 302 = | | 8) 300 * 300 - 2 * 2 = 89996 |
| 9) | 290 * 310 = | | 9) 300 * 300 - 10 * 10 = 89900 |
| 10) | 297 * 303 = | | 10) 300 * 300 - 3 * 3 = 89991 |
| 11) | 138 * 25 - 25 * 38 = | | 11) ( 138 - 38) * 25 = 2500 |
| 12) | 162 * 61 - 61 * 62 = | | 12) ( 162 - 62) * 61 = 6100 |
| 13) | 26 * 43 + 26 * 157 = | | 13) ( 157 + 43) * 26 = 5200 |
| 14) | 31 * 152 - 31 * 52 = | | 14) ( 152 - 52) * 31 = 3100 |
| 15) | 82 * 40 + 82 * 160 = | | 15) ( 160 + 40) * 82 = 16400 |
| 16) | 37 * 136 - 36 * 37 = | | 16) ( 136 - 36) * 37 = 3700 |
| 17) | 92 * 41 + 92 * 59 = | | 17) ( 41 + 59) * 92 = 9200 |
| 18) | 247 * 77 - 77 * 47 = | | 18) ( 247 - 47) * 77 = 15400 |
| 19) | 155 * 23 + 45 * 23 = | | 19) ( 155 + 45) * 23 = 4600 |
| 20) | 273 * 61 - 61 * 73 = | | 20) ( 273 - 73) * 61 = 12200 |
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Score: ______________ | |
