简算题,一定要简算21X(9.3-3.7)-5.618-1.8÷0.125÷0.8

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简算题,一定要简算21X(9.3-3.7)-5.618-1.8÷0.125÷0.8简算题,一定要简算21X(9.3-3.7)-5.618-1.8÷0.125÷0.8简算题,一定要简算21X(9.3-3

简算题,一定要简算21X(9.3-3.7)-5.618-1.8÷0.125÷0.8
简算题,一定要简算
21X(9.3-3.7)-5.6
18-1.8÷0.125÷0.8

简算题,一定要简算21X(9.3-3.7)-5.618-1.8÷0.125÷0.8
=21x5.6-1x5.6
=20x5.6
=112
=18-1.8x1÷0.125÷0.8
=18-1.8x(1÷0.125÷0.8)
=18-1.8x(8÷0.8)
=18-18
=0