Question

18.9÷0.2÷4.5怎么简便计算?

Answer 1

25.48-（9.4-4.52）
=25.48+4.52-9.4
=20.6

0.45×201
=0.45×200+0.45
=90.45

28×[(7.88+1.22)÷26]
=28×(9.1÷26)
=28÷26×9.1
=9.8