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脱式计算.13×25%+13÷42.4÷240%÷51.2×92+7×120%+1.2
脱式计算.
13×25%+13÷42.4÷240%÷51.2×92+7×120%+1.2
1回答
2019-04-22 21:54
脱式计算.13×25%+13÷42.4÷240%÷51.2×92+7×120%+1.2
脱式计算.
13×25%+13÷42.4÷240%÷51.2×92+7×120%+1.2
13×25%+13÷4
=13×(1/4)+13×(1/4)
=13×(1/4+1/4)
=13×(1/2)
=6.6
2.4÷240%÷5
=2.4÷2.4÷5
=1÷5
=0.2
1.2×92+7×120%+1.2
=1.2×92+7×1.2+1.2
=1.2×(92+7+1)
=1.2×100
=120