1- =
2- = =
说理:__________。
32a+a= 2.5×0.8= 0.36÷3.6= 9÷0.3=
4.5÷9= 12-4.9= 6.7×100= 3.5×4=
+ = + = - = 0.5+ =
1- = 1- - = + + = + - + =
0.23= 7.8+0.8= 12÷0.4=
4×0.25= 1.25×5×8= 7.6×8+2.4×8=
4.56+4.44= 0.36÷0.6= 43= 1.25×5×8=
0.2×5÷0.2×5= 3-1.48= 12÷0.4= 4×0.25=