解:2.6X0.5十7.4÷2 =2.6X1/2十7.4X1/2 =1/2 X(2.6十7.4) =1/2 X10 =5
最简便
2.6×0.5+7.4÷2=2.6×0.5+7.4x0.5=(2.6+7.4)x0.5=10x0.5=5希望能帮到你!
2.6×0.5+7.4÷2=2.6/2+7.4/2=(2.6+7.4)/2=10/2=5