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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Wednesday December 03 2025
10:43:50 AM | Wednesday December 03 2025
10:43:50 AMFlip Answers |
| 1) | 96 * 104 = | | 1) 100 * 100 - 4 * 4 = 9984 |
| 2) | 310 * 290 = | | 2) 300 * 300 - 10 * 10 = 89900 |
| 3) | 406 * 394 = | | 3) 400 * 400 - 6 * 6 = 159964 |
| 4) | 93 * 107 = | | 4) 100 * 100 - 7 * 7 = 9951 |
| 5) | 308 * 292 = | | 5) 300 * 300 - 8 * 8 = 89936 |
| 6) | 92 * 108 = | | 6) 100 * 100 - 8 * 8 = 9936 |
| 7) | 391 * 409 = | | 7) 400 * 400 - 9 * 9 = 159919 |
| 8) | 98 * 102 = | | 8) 100 * 100 - 2 * 2 = 9996 |
| 9) | 201 * 199 = | | 9) 200 * 200 - 1 * 1 = 39999 |
| 10) | 191 * 209 = | | 10) 200 * 200 - 9 * 9 = 39919 |
| 11) | 245 * 62 - 45 * 62 = | | 11) ( 245 - 45) * 62 = 12400 |
| 12) | 268 * 48 - 68 * 48 = | | 12) ( 268 - 68) * 48 = 9600 |
| 13) | 254 * 45 - 45 * 54 = | | 13) ( 254 - 54) * 45 = 9000 |
| 14) | 156 * 77 + 44 * 77 = | | 14) ( 156 + 44) * 77 = 15400 |
| 15) | 73 * 150 + 73 * 50 = | | 15) ( 150 + 50) * 73 = 14600 |
| 16) | 241 * 26 - 41 * 26 = | | 16) ( 241 - 41) * 26 = 5200 |
| 17) | 141 * 51 - 41 * 51 = | | 17) ( 141 - 41) * 51 = 5100 |
| 18) | 264 * 44 - 44 * 64 = | | 18) ( 264 - 64) * 44 = 8800 |
| 19) | 37 * 64 + 36 * 37 = | | 19) ( 36 + 64) * 37 = 3700 |
| 20) | 247 * 70 - 47 * 70 = | | 20) ( 247 - 47) * 70 = 14000 |
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Score: ______________ | |
