2.4,3.2,4,4.8,,
16,15.4,14.8,14.2,,
12.8×32=×3.2 14.5×56=×560
1.65÷4.3=÷43 1.8÷0.25=÷1
2.2+5.78= 0.4×300 a-0.7a= 75.9-18.4-1.4=
1.7×20= 1.2÷0.06= 52-32= 5.2b-b-0.2b=
A.
B.
C.