4×=
×=
=
×2.5=
×30= ÷ = + = ÷ = 0× =
3.2÷0.4= 5- = × = 1.21× = ÷2.2=
①540÷6=90 (千克)
解决的问题是:
②90×12=1080 (千克)
A.
B.
C.