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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Tuesday June 16 2026
02:56:41 AM | Tuesday June 16 2026
02:56:41 AMFlip Answers |
| 1) | 94 * 106 = | | 1) 100 * 100 - 6 * 6 = 9964 |
| 2) | 207 * 193 = | | 2) 200 * 200 - 7 * 7 = 39951 |
| 3) | 396 * 404 = | | 3) 400 * 400 - 4 * 4 = 159984 |
| 4) | 194 * 206 = | | 4) 200 * 200 - 6 * 6 = 39964 |
| 5) | 203 * 197 = | | 5) 200 * 200 - 3 * 3 = 39991 |
| 6) | 208 * 192 = | | 6) 200 * 200 - 8 * 8 = 39936 |
| 7) | 190 * 210 = | | 7) 200 * 200 - 10 * 10 = 39900 |
| 8) | 393 * 407 = | | 8) 400 * 400 - 7 * 7 = 159951 |
| 9) | 405 * 395 = | | 9) 400 * 400 - 5 * 5 = 159975 |
| 10) | 191 * 209 = | | 10) 200 * 200 - 9 * 9 = 39919 |
| 11) | 71 * 26 + 71 * 74 = | | 11) ( 26 + 74) * 71 = 7100 |
| 12) | 139 * 33 + 61 * 33 = | | 12) ( 139 + 61) * 33 = 6600 |
| 13) | 273 * 68 - 73 * 68 = | | 13) ( 273 - 73) * 68 = 13600 |
| 14) | 37 * 270 - 70 * 37 = | | 14) ( 270 - 70) * 37 = 7400 |
| 15) | 40 * 57 + 160 * 57 = | | 15) ( 160 + 40) * 57 = 11400 |
| 16) | 164 * 28 - 28 * 64 = | | 16) ( 164 - 64) * 28 = 2800 |
| 17) | 87 * 147 - 87 * 47 = | | 17) ( 147 - 47) * 87 = 8700 |
| 18) | 157 * 31 - 57 * 31 = | | 18) ( 157 - 57) * 31 = 3100 |
| 19) | 34 * 260 - 60 * 34 = | | 19) ( 260 - 60) * 34 = 6800 |
| 20) | 268 * 77 - 77 * 68 = | | 20) ( 268 - 68) * 77 = 15400 |
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Score: ______________ | |
