简便计算.5.68减4.98减0.11,1除以(1减0.98),9.9乘7.8.

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简便计算.5.68减4.98减0.11,1除以(1减0.98),9.9乘7.8.

简便计算.5.68减4.98减0.11,1除以(1减0.98),9.9乘7.8.
简便计算.5.68减4.98减0.11,1除以(1减0.98),9.9乘7.8.

简便计算.5.68减4.98减0.11,1除以(1减0.98),9.9乘7.8.
5.68-4.98-0.11
=0.7-0.11
=0.59
1÷(1-0.98)
=1÷0.02
=(1x5)÷(0.02x5)
=5÷0.1
=50
9.9x7.8
=(10-0.1)x7.8
=10x7.8-0.1x7.8
=78-0.78
=77.22

5.68-4.98-0.11=5.68-5+0.02-0.11=0.68+0.02-0.11=0.59
1/(1-0.98)=100/(100-98)=50
9.9*7.8=(10-0.1)*7.8=10*7.8-0.1*7.8=77.22