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1. 直接写出得数。(20☆)
5.6÷100=
0.35×2=
8.9×0=
1.4×0.5=
0.3÷0.5=
41.9÷100=
100÷0.4=
12.5×8=
2.1÷0.7=
0.004×100=
1.3+0.07=
9.36÷0.9=
20÷0.2=
5.6+3.8=
64.2÷2=
48÷0.6=
4.8÷0.3=
16.8÷4=
2.54×20=
3.81×7=
6.3÷0.7=
0.04×2.5=
4.17×3=
4-0.32=
0.78÷3=
1×0.4=
0.6+0.54=
3.52×10=
7-0.23=
7.2-0.8=
4.5×2=
73.5÷3=
29÷100=
6+2.4=
72.8×0.1=
10.1×5=
0.3÷1.5=
0.35÷0.5=
9.63÷3=
11×0.1=
5.6÷100=
0.056
0.35×2=
0.7
8.9×0=
0
1.4×0.5=
0.7
0.3÷0.5=
0.6
41.9÷100=
0.419
100÷0.4=
250
12.5×8=
100
2.1÷0.7=
3
0.004×100=
0.4
1.3+0.07=
1.37
9.36÷0.9=
10.4
20÷0.2=
100
5.6+3.8=
9.4
64.2÷2=
32.1
48÷0.6=
80
4.8÷0.3=
16
16.8÷4=
4.2
2.54×20=
50.8
3.81×7=
26.67
6.3÷0.7=
9
0.04×2.5=
0.1
4.17×3=
12.51
4-0.32=
3.68
0.78÷3=
0.26
1×0.4=
0.4
0.6+0.54=
1.14
3.52×10=
35.2
7-0.23=
6.77
7.2-0.8=
6.4
4.5×2=
9
73.5÷3=
24.5
29÷100=
0.29
6+2.4=
8.4
72.8×0.1=
7.28
10.1×5=
50.5
0.3÷1.5=
0.2
0.35÷0.5=
0.7
9.63÷3=
3.21
11×0.1=
1.1
答案
0.056 0.7 0 0.7 0.6 0.419 250 100 3 0.4 1.37 10.4 100 9.4 32.1 80 16 4.2 50.8 26.67 9 0.1 12.51 3.68 0.26 0.4 1.14 35.2 6.77 6.4 9 24.5 0.29 8.4 7.28 50.5 0.2 0.7 3.21 1.1
2. 在下面的括号里填上适当的数。(18☆)
$0.65dm^2= $(
$4.2dm^2= $(
$1100m^2= $(
$4.4km^2= $(
0.27公顷$= $(
4公顷$= $(
$7km^2= $(
$0.65dm^2= $(
65
)$cm^2$$4.2dm^2= $(
420
)$cm^2$$1100m^2= $(
0.11
)公顷$4.4km^2= $(
440
)公顷0.27公顷$= $(
2700
)$m^2= $(270000
)$dm^2$4公顷$= $(
40000
)$m^2$$7km^2= $(
700
)公顷$= $(7000000
)$m^2$答案
65 420 0.11 440 2700 270000 40000 700 7000000
3. 计算下面各图形的面积。(单位:cm)(18☆)
(1)(
(1)(
1200cm²
) (2)(2012cm²
) (3)(76cm²
)答案
(1)$1200cm^{2}$ (2)$2012cm^{2}$ (3)$76cm^{2}$
4. 解方程。(12☆)
2x-5.4= 10.6
3x-6×0.95= 5.7
1.25x+3.75x= 12.6
2x-5.4= 10.6
x=8
3x-6×0.95= 5.7
x=3.8
1.25x+3.75x= 12.6
x=2.52
答案
$x=8$ $x=3.8$ $x=2.52$
