简便运算,过程及答案
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/14 17:41:40
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简便运算,过程及答案
简便运算,过程及答案
简便运算,过程及答案
=2.4*20.6+20.6*7.6+12.5*7.6
=(2.4+7.6)*20.6+12.5*4*1.9
=10*20.6+50*1.9
=206+95
=301
33.1×(10-2.4)+2.4×20.6=331-33.1×2.4+20.6×2.4=331-(33.1-20.6)×2.4=331-12.5×2.4=331-12.5×4×0.6=331-50×0.6=331-30=301
=2.4x20又3/5+33.1x(7.6+2.4)-33.1x2.4二(20.6-33.1)x2.4+331二331-12.5x2.4二331-30=301