2.4×50%=
60×30%=
21÷70%=
84÷40%=
2-57%=
1.2+20%=
36×75%=
57÷57%=
=
32=
16-60%=
2×110%=
7×3.14=
30%+=
8×0.25×4=
2.4×5= ÷= 4.8×= ÷3×=
25÷25%= ÷= 35÷= ×÷×=
= = = =
= = 7π= =
× 2.8× 0.5×
÷ 0.4×40% 25%×
每分钟注入水量/升
20
30
________
所需时间/分钟
10
5
7.53﹣2.5= 45+215= ×63=
﹣= 24÷= +÷=