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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Thursday November 20 2025
06:40:16 PM | Thursday November 20 2025
06:40:16 PMFlip Answers |
| 1) | 296 * 304 = | | 1) 300 * 300 - 4 * 4 = 89984 |
| 2) | 98 * 102 = | | 2) 100 * 100 - 2 * 2 = 9996 |
| 3) | 203 * 197 = | | 3) 200 * 200 - 3 * 3 = 39991 |
| 4) | 109 * 91 = | | 4) 100 * 100 - 9 * 9 = 9919 |
| 5) | 107 * 93 = | | 5) 100 * 100 - 7 * 7 = 9951 |
| 6) | 302 * 298 = | | 6) 300 * 300 - 2 * 2 = 89996 |
| 7) | 295 * 305 = | | 7) 300 * 300 - 5 * 5 = 89975 |
| 8) | 310 * 290 = | | 8) 300 * 300 - 10 * 10 = 89900 |
| 9) | 297 * 303 = | | 9) 300 * 300 - 3 * 3 = 89991 |
| 10) | 302 * 298 = | | 10) 300 * 300 - 2 * 2 = 89996 |
| 11) | 22 * 246 - 22 * 46 = | | 11) ( 246 - 46) * 22 = 4400 |
| 12) | 77 * 44 + 56 * 77 = | | 12) ( 56 + 44) * 77 = 7700 |
| 13) | 27 * 62 + 62 * 73 = | | 13) ( 27 + 73) * 62 = 6200 |
| 14) | 148 * 25 + 25 * 52 = | | 14) ( 148 + 52) * 25 = 5000 |
| 15) | 257 * 39 - 57 * 39 = | | 15) ( 257 - 57) * 39 = 7800 |
| 16) | 35 * 25 + 75 * 35 = | | 16) ( 25 + 75) * 35 = 3500 |
| 17) | 243 * 51 - 43 * 51 = | | 17) ( 243 - 43) * 51 = 10200 |
| 18) | 144 * 90 - 44 * 90 = | | 18) ( 144 - 44) * 90 = 9000 |
| 19) | 53 * 48 + 48 * 147 = | | 19) ( 147 + 53) * 48 = 9600 |
| 20) | 171 * 47 - 47 * 71 = | | 20) ( 171 - 71) * 47 = 4700 |
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Score: ______________ | |
