41.2*8.1+11*1.25+53.7*1.9的简算

znviduafi2 1年前 已收到4个回答 举报
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佩卿 幼苗

共回答了21个问题采纳率：85.7% 举报

=41.2*8.1+11*1.25+(41.2+12.5)*1.9
=41.2*(8.1+1.9)+11*1.25+12.5*1.9
=412+12.5*(1.1+1.9)
=412+12.5*3
=412+37.5
=449.5

1年前

2

ic_design 幼苗

共回答了11个问题 举报

=41.2*8.1+11*1.25+53.7*1.9+12.5*8.1-12.5*8.1
=53.7*8.1+53.7*1.9+11*1.25-12.5*8.1
=53.7*10-12.5*7
=537-12.5*(8-1)
=537-100+12.5
=449.5

1年前

3

rmts 幼苗

共回答了5个问题 举报

=41.2*8+41.2+11*5/4+53.7*20-53.7
=1404.85

1年前

3

xiaohaha2006 幼苗

共回答了471个问题 举报

41.2*8.1+11*1.25+53.7*1.9
=41.2*(10-1.9)+53.7*1.9 +11*1.25
=412+(53.7-41.2)*1.9+11*1.25
=412+1.25*19+1.25*11
=412+1.25*30
=412+37.5
=449.5

1年前

1
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