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

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

人气：261 ℃　时间：2020-05-19 07:55:23

解答

=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