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 February 15 2026
03:34:38 AM | Sunday February 15 2026
03:34:38 AMFlip Answers |
| 1) | 206 * 194 = | | 1) 200 * 200 - 6 * 6 = 39964 |
| 2) | 96 * 104 = | | 2) 100 * 100 - 4 * 4 = 9984 |
| 3) | 407 * 393 = | | 3) 400 * 400 - 7 * 7 = 159951 |
| 4) | 395 * 405 = | | 4) 400 * 400 - 5 * 5 = 159975 |
| 5) | 208 * 192 = | | 5) 200 * 200 - 8 * 8 = 39936 |
| 6) | 199 * 201 = | | 6) 200 * 200 - 1 * 1 = 39999 |
| 7) | 195 * 205 = | | 7) 200 * 200 - 5 * 5 = 39975 |
| 8) | 191 * 209 = | | 8) 200 * 200 - 9 * 9 = 39919 |
| 9) | 407 * 393 = | | 9) 400 * 400 - 7 * 7 = 159951 |
| 10) | 94 * 106 = | | 10) 100 * 100 - 6 * 6 = 9964 |
| 11) | 255 * 26 - 26 * 55 = | | 11) ( 255 - 55) * 26 = 5200 |
| 12) | 144 * 59 - 44 * 59 = | | 12) ( 144 - 44) * 59 = 5900 |
| 13) | 67 * 60 + 67 * 40 = | | 13) ( 40 + 60) * 67 = 6700 |
| 14) | 21 * 65 + 35 * 21 = | | 14) ( 65 + 35) * 21 = 2100 |
| 15) | 253 * 30 - 30 * 53 = | | 15) ( 253 - 53) * 30 = 6000 |
| 16) | 266 * 54 - 66 * 54 = | | 16) ( 266 - 66) * 54 = 10800 |
| 17) | 61 * 141 - 61 * 41 = | | 17) ( 141 - 41) * 61 = 6100 |
| 18) | 84 * 150 + 84 * 50 = | | 18) ( 150 + 50) * 84 = 16800 |
| 19) | 34 * 161 - 34 * 61 = | | 19) ( 161 - 61) * 34 = 3400 |
| 20) | 145 * 93 - 93 * 45 = | | 20) ( 145 - 45) * 93 = 9300 |
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Score: ______________ | |
