=7.3×0
=0
学校买来9套桌椅,共花3645元.
0.8×[12-(4.12+5.38)]=
12.5×8= 0.4×0.8= 40×0.05= 4.9a-0.4a=
1.6÷8= 1.5÷0.03=1÷0.125= 0.22= 1÷0.1+9×0.1=
①21÷3.5+21÷15
②36.8×99+36.8
③60.8-36÷7.5
④3.09×3.9÷2.6
⑤12.5×4×0.8×2.5
⑥(2.1+6.9+0.15)÷0.1
÷ = + = 2.8÷70%= 25×0.4×5=
6- = × = 3.14×52= 0.3×0.2÷0.3×0.2=