1. 直接写出得数。
3.52 - 1 = 0.86 - 0.07 = 2.57 - 1.81 = 8.27 - 1.9 - 3.27 =
3.12×100 = 0.18×2 = 23.7 + 0.23 = 2.3×0.2×5 =
2.08÷4 = 1.17×100 = 16×0.1 = 1.8÷2.5÷4 =
6.8×0.01 = 0.1÷2 = 26÷0.5 = 0.5 + 0.5×0.9 =
8.08÷0.8 = 1.6÷0.5 = 38×0.5 = 4.5÷0.9×0.3 =
63÷0.9 = 1.4×50 = 130×0.04 = 0.125×0.8 =
3 - 0.73 = 0.52 + 2.48 = 3.6÷0.18 = 1 + 0.47 + 0.53 =
4.8 + 0.16 = 2.7×3 = 6.6×5 = 8 - 2.45 + 1.55 =
2.8 - 1.6 = 2.35 - 0.03 = 3.87÷0.1 = 2.96 + 1.8 + 0.04 =
3.5×0.4 = 4.5÷90 = 15.2×0.3 = 4.8 + 4.8×9 =

1. 2.52 0.79 0.76 3.1
312 0.36 23.93 2.3
0.52 117 1.6 0.18
0.068 0.05 52 0.95
10.1 3.2 19 1.5
70 70 5.2 0.1
2.27 3 20 2
4.96 8.1 33 7.1
1.2 2.32 38.7 4.8
1.4 0.05 4.56 48

2. 解方程。
18x = 54 x÷32 = 20 1.7x = 68
x÷12 = 1.2 0.2x = 0.64 x÷0.8 = 7

2. $x = 3$ $x = 640$ $x = 40$
$x = 14.4$ $x = 3.2$ $x = 5.6$

根据下图所给的信息，在下面的〇里填“＞”“＜”或“=”。

思维提升
$=$         $＜$         $＞$