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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Tuesday April 21 2026
09:09:50 AM | Tuesday April 21 2026
09:09:50 AMFlip Answers |
| 1) | 106 * 94 = | | 1) 100 * 100 - 6 * 6 = 9964 |
| 2) | 107 * 93 = | | 2) 100 * 100 - 7 * 7 = 9951 |
| 3) | 392 * 408 = | | 3) 400 * 400 - 8 * 8 = 159936 |
| 4) | 202 * 198 = | | 4) 200 * 200 - 2 * 2 = 39996 |
| 5) | 205 * 195 = | | 5) 200 * 200 - 5 * 5 = 39975 |
| 6) | 98 * 102 = | | 6) 100 * 100 - 2 * 2 = 9996 |
| 7) | 103 * 97 = | | 7) 100 * 100 - 3 * 3 = 9991 |
| 8) | 96 * 104 = | | 8) 100 * 100 - 4 * 4 = 9984 |
| 9) | 199 * 201 = | | 9) 200 * 200 - 1 * 1 = 39999 |
| 10) | 307 * 293 = | | 10) 300 * 300 - 7 * 7 = 89951 |
| 11) | 27 * 170 - 27 * 70 = | | 11) ( 170 - 70) * 27 = 2700 |
| 12) | 70 * 159 - 59 * 70 = | | 12) ( 159 - 59) * 70 = 7000 |
| 13) | 60 * 49 + 60 * 151 = | | 13) ( 151 + 49) * 60 = 12000 |
| 14) | 88 * 253 - 53 * 88 = | | 14) ( 253 - 53) * 88 = 17600 |
| 15) | 160 * 48 - 48 * 60 = | | 15) ( 160 - 60) * 48 = 4800 |
| 16) | 47 * 61 + 61 * 53 = | | 16) ( 47 + 53) * 61 = 6100 |
| 17) | 35 * 170 - 35 * 70 = | | 17) ( 170 - 70) * 35 = 3500 |
| 18) | 84 * 238 - 38 * 84 = | | 18) ( 238 - 38) * 84 = 16800 |
| 19) | 151 * 93 - 93 * 51 = | | 19) ( 151 - 51) * 93 = 9300 |
| 20) | 68 * 51 + 68 * 49 = | | 20) ( 49 + 51) * 68 = 6800 |
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Score: ______________ | |
