早教吧 育儿知识 作业答案 考试题库 百科 知识分享

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
8.59+2.57+3.43+5.47          125×72×4         1546-(546-239)
301×79             49.62+27.17-19.62           728×79+272×798.59+2.57+3.43+5.47          125×72×4         1546-(546-239)301×79             49.62+27.17-19.62           728×79+272×79301×79             49.62+27.17-19.62           728×79+272×798.59+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)
▼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...