①960-900÷4÷25
②28.1-5.7+1.9-4.3
③4×()-0.4
④3.7×+1.3÷
⑤10÷()
⑥
1.38﹣0.03=
÷ =
0.28× =
36×25%=
﹣ =
0.72÷0.04=
400÷25÷4=
0.3×2÷0.3×2=
19+23=
5﹣1.6=
0.23÷0.1=
0.4×0.2=
=
÷0.25=
4人有几只手?
8只手上共有几根手指?
口诀: