怎样算简便就怎样算.5.3+8.44+4.7+1.56 400﹣(1300÷65+35)15.35﹣(5.35+3.88)29×46﹣46×19 87×102 6.78﹣3.86+0.92.
=4: .
15: ==0.6= ÷10= 成.
0.6== : == %
4÷5===12: = [小数].