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用简便方法计算.301×7949.62+27.17-19.62728×79+272×798.59+2.57+3.43+5.47125×72×41546-(546-239)
题目详情
用简便方法计算.
301×79 49.62+27.17-19.62 728×79+272×79 8.59+2.57+3.43+5.47 125×72×4 1546-(546-239) 301×79 49.62+27.17-19.62 728×79+272×79 301×79 49.62+27.17-19.62 728×79+272×79 8.59+2.57+3.43+5.47 125×72×4 1546-(546-239) 8.59+2.57+3.43+5.47 125×72×4 1546-(546-239)
301×79 | 49.62+27.17-19.62 | 728×79+272×79 |
8.59+2.57+3.43+5.47 | 125×72×4 | 1546-(546-239) |
301×79 | 49.62+27.17-19.62 | 728×79+272×79 |
8.59+2.57+3.43+5.47 | 125×72×4 | 1546-(546-239) |
▼优质解答
答案和解析
(1)301×79=(300+1)×79=300×79+1×79=23700+79=23779;(2)49.62+27.17-19.62=49.62-19.62+27.17=30+27.17=57.17;(3)728×79+272×79=(728+272)×79=1000×79=79000;(4)8.59+2.57+3.43+5.47=8.59+5.4...
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