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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Friday June 12 2026
01:05:44 AM | Friday June 12 2026
01:05:44 AMFlip Answers |
| 1) | 206 * 194 = | | 1) 200 * 200 - 6 * 6 = 39964 |
| 2) | 104 * 96 = | | 2) 100 * 100 - 4 * 4 = 9984 |
| 3) | 295 * 305 = | | 3) 300 * 300 - 5 * 5 = 89975 |
| 4) | 107 * 93 = | | 4) 100 * 100 - 7 * 7 = 9951 |
| 5) | 308 * 292 = | | 5) 300 * 300 - 8 * 8 = 89936 |
| 6) | 204 * 196 = | | 6) 200 * 200 - 4 * 4 = 39984 |
| 7) | 195 * 205 = | | 7) 200 * 200 - 5 * 5 = 39975 |
| 8) | 299 * 301 = | | 8) 300 * 300 - 1 * 1 = 89999 |
| 9) | 201 * 199 = | | 9) 200 * 200 - 1 * 1 = 39999 |
| 10) | 90 * 110 = | | 10) 100 * 100 - 10 * 10 = 9900 |
| 11) | 80 * 65 + 80 * 135 = | | 11) ( 135 + 65) * 80 = 16000 |
| 12) | 141 * 33 + 33 * 59 = | | 12) ( 141 + 59) * 33 = 6600 |
| 13) | 250 * 82 - 82 * 50 = | | 13) ( 250 - 50) * 82 = 16400 |
| 14) | 251 * 37 - 37 * 51 = | | 14) ( 251 - 51) * 37 = 7400 |
| 15) | 63 * 62 + 38 * 63 = | | 15) ( 38 + 62) * 63 = 6300 |
| 16) | 94 * 149 - 94 * 49 = | | 16) ( 149 - 49) * 94 = 9400 |
| 17) | 59 * 240 - 40 * 59 = | | 17) ( 240 - 40) * 59 = 11800 |
| 18) | 67 * 58 + 142 * 67 = | | 18) ( 142 + 58) * 67 = 13400 |
| 19) | 138 * 35 + 62 * 35 = | | 19) ( 138 + 62) * 35 = 7000 |
| 20) | 22 * 170 - 22 * 70 = | | 20) ( 170 - 70) * 22 = 2200 |
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Score: ______________ | |
