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 May 01 2026
01:20:01 AM | Friday May 01 2026
01:20:01 AMFlip Answers |
| 1) | 92 * 108 = | | 1) 100 * 100 - 8 * 8 = 9936 |
| 2) | 197 * 203 = | | 2) 200 * 200 - 3 * 3 = 39991 |
| 3) | 301 * 299 = | | 3) 300 * 300 - 1 * 1 = 89999 |
| 4) | 97 * 103 = | | 4) 100 * 100 - 3 * 3 = 9991 |
| 5) | 290 * 310 = | | 5) 300 * 300 - 10 * 10 = 89900 |
| 6) | 407 * 393 = | | 6) 400 * 400 - 7 * 7 = 159951 |
| 7) | 410 * 390 = | | 7) 400 * 400 - 10 * 10 = 159900 |
| 8) | 392 * 408 = | | 8) 400 * 400 - 8 * 8 = 159936 |
| 9) | 199 * 201 = | | 9) 200 * 200 - 1 * 1 = 39999 |
| 10) | 99 * 101 = | | 10) 100 * 100 - 1 * 1 = 9999 |
| 11) | 25 * 261 - 61 * 25 = | | 11) ( 261 - 61) * 25 = 5000 |
| 12) | 240 * 80 - 80 * 40 = | | 12) ( 240 - 40) * 80 = 16000 |
| 13) | 35 * 23 + 23 * 65 = | | 13) ( 35 + 65) * 23 = 2300 |
| 14) | 144 * 28 - 28 * 44 = | | 14) ( 144 - 44) * 28 = 2800 |
| 15) | 156 * 66 - 66 * 56 = | | 15) ( 156 - 56) * 66 = 6600 |
| 16) | 58 * 65 + 35 * 58 = | | 16) ( 65 + 35) * 58 = 5800 |
| 17) | 256 * 27 - 27 * 56 = | | 17) ( 256 - 56) * 27 = 5400 |
| 18) | 58 * 137 - 37 * 58 = | | 18) ( 137 - 37) * 58 = 5800 |
| 19) | 41 * 68 + 41 * 32 = | | 19) ( 32 + 68) * 41 = 4100 |
| 20) | 64 * 59 + 64 * 41 = | | 20) ( 59 + 41) * 64 = 6400 |
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Score: ______________ | |
