一、口算。
2×0.75 =
1.6 - 0.57 =
2.4 + 0.45 =
1.25 - 0.66 =
0.7×1.2 =
20.5÷0.5 =
0.14 + 0.96 =
2.1 - 0.09 =
390×0.01 =
0.25×0.8 =
3.82 + 5.12 =
0.9÷30 =
4.03 - 0.3 =
4.5÷3 =
0.2×0.25 =
3.4÷17 =
4.5 + 1.34 =
16÷0.8 =
10 - 9.54 =
4×0.45 =
4.5 - 2.8 =
5.8 + 0.29 =
0.69÷23 =
4.8×50 =
0.9×4.1 =
0.89×1000 =
0.18 - 0.13 =
0.26 + 0.5 =
1÷0.25 =
2.8×0.5 =

1.5 1.03 2.85
0.59 0.84 41
1.1 2.01 3.9
0.2 8.94 0.03
3.73 1.5 0.05
0.2 5.84 20
0.46 1.8 1.7
6.09 0.03 240
3.69 890 0.05
0.76 4 1.4

二、下面的式子中，哪些是等式？哪些是方程？连一连。
y + 17 = 35
60 - 20 ＜ 56
4 + 5 = 9
方程 等式
7x = 28
6a + 5b
$\frac{x}{5}=\frac{3}{15}$