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Math Main Page => Exercises - Math III
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| Sunday July 06 2008 04:23:33 PM | Sunday July 06 2008 04:23:33 PM | ||
| 1) | 92 * 108 = | 1) 100 * 100 - 8 * 8 = 9936 | |
| 2) | 194 * 206 = | 2) 200 * 200 - 6 * 6 = 39964 | |
| 3) | 95 * 105 = | 3) 100 * 100 - 5 * 5 = 9975 | |
| 4) | 409 * 391 = | 4) 400 * 400 - 9 * 9 = 159919 | |
| 5) | 297 * 303 = | 5) 300 * 300 - 3 * 3 = 89991 | |
| 6) | 99 * 101 = | 6) 100 * 100 - 1 * 1 = 9999 | |
| 7) | 104 * 96 = | 7) 100 * 100 - 4 * 4 = 9984 | |
| 8) | 391 * 409 = | 8) 400 * 400 - 9 * 9 = 159919 | |
| 9) | 310 * 290 = | 9) 300 * 300 - 10 * 10 = 89900 | |
| 10) | 396 * 404 = | 10) 400 * 400 - 4 * 4 = 159984 | |
| 11) | 48 * 56 + 48 * 44 = | ( 44 + 56) * 48 = 4800 | |
| 12) | 142 * 89 - 42 * 89 = | ( 142 - 42) * 89 = 8900 | |
| 13) | 48 * 156 - 48 * 56 = | ( 156 - 56) * 48 = 4800 | |
| 14) | 255 * 90 - 90 * 55 = | ( 255 - 55) * 90 = 18000 | |
| 15) | 31 * 27 + 69 * 27 = | ( 31 + 69) * 27 = 2700 | |
| 16) | 171 * 40 - 40 * 71 = | ( 171 - 71) * 40 = 4000 | |
| 17) | 165 * 53 - 65 * 53 = | ( 165 - 65) * 53 = 5300 | |
| 18) | 68 * 24 + 32 * 24 = | ( 32 + 68) * 24 = 2400 | |
| 19) | 257 * 69 - 69 * 57 = | ( 257 - 57) * 69 = 13800 | |
| 20) | 97 * 135 + 65 * 97 = | ( 135 + 65) * 97 = 19400 | |
Score: ______________ | |||