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(1)1.45×10=

(2)1.45×100=

(3)1.45×1000=

答案:14.5;145;1450
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科目:小学数学 来源: 题型:

3.2×0.2= 1.4×0.4= 3.3÷3= 1.2÷0.3= 0.56÷8=
2.5×0.4= 1.5×2= 0.7×7= 7.3+0.3= 1.23×3=
0.53-0.3= 1.8×0.5= 0.9×0.01= 0.23×3= 1.6÷0.04=
2-1.2= 7.8÷6= 8.4÷0.21= 8.4÷0.7= 1.23×3=
5.6+3.6= 9-2.35= 0.56÷8= 7.3+2.7= 4.8÷1.2=
5.6÷0.4= 4.5÷0.9= 8.1×2= 90÷3= 7.2÷0.9=
1.23+3= 5.6+1.23= 4.5×2= 5.6÷1.4= 6.6÷1.1=
2.1÷3= 0.6×0.5= 3.23×2= 1.8÷3= 7.2÷6=
12.5÷0.1= 0.32÷0.8= 1.6+3.7= 0.45×0.2= 4.8÷0.08=
0.36÷1.8= 0.4×0.5= 8.4+5.6= 8.4÷2.1= 1.8×0.4=
0.01×8= 7.31×100= 0.09×6= 0.8×0.6= 3+2.3=
1.25×8= 3÷5= 2.3+2.3= 6.23+3.6= 9.3÷3=
4.8÷0.8= 7.5-4.5= 5.7+4.3= 0.75÷15= 1÷0.25=
1.2×60= 6÷0.2= 0.21×4= 0.25×4×9= 2.33×1.2=
0.62÷0.62-1= 5+3.2÷0.8= 7.5÷2.5×0= 3.9×0.01= 0.001+10.099=
3-0.98= 6×0.25= 0.63÷0.9= 8.95÷0.895=

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科目:小学数学 来源: 题型:

1
2
×
2
5
=
1
5
1
5
5
7
÷
2
7
=
5
2
5
2
1
2
÷
1
4
=
2,
2,
1
3
=
9,
9,
10÷
1
8
×8=
640,
640,
5
14
×7=
5
2
5
2
3
5
+
2
5
=
1,
1,
100×
7
20
=
35,
35,
3
16
=
3
2
3
2
3
8
÷
3
8
×
5
6
=
5
6
5
6
1
4
+
1
3
=
7
12
7
12
1
4
=
0,
0,
2
9
=
2
9
2
9
7
12
÷
7
12
=
1,
1,
1
4
÷4×
1
4
=
1
16
1
16
5
6
×36=
30,
30,
3
10
=
10,
10,
10÷
5
9
=
18,
18,
6
5
÷
3
5
=
2,
2,
5
9
×
3
5
×3=
1,
1,
2
7
×14=
4,
4,
2
9
×
3
5
=
2
15
2
15
1
2
×3=
3
2
3
2
6
11
×
11
6
=
1,
1,
9×(2+
5
9
)=
23,
23,
70÷
7
10
=
100,
100,
19×
1
38
=
1
2
1
2
4
5
÷8%=
10,
10,
7
8
=
8
7
8
7
3
4
×
3
8
=
0
0

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科目:小学数学 来源: 题型:

小马虎做作业,有一次粗心的他把下面的计算全做错了,请细心的你仔细观察他做错的原因,并帮他改正.
(1)
7
8
+
1
8
×
4
5
=(
7
8
+
1
8
4
5
=1×
4
5
=
4
5
    
更正:
7
8
+
1
8
×
4
5

=
7
8
+
1
10

=
39
40
7
8
+
1
8
×
4
5

=
7
8
+
1
10

=
39
40

(2)72×
5
8
÷72×
5
8

=(72×
5
8
)÷(72×
5
8
)    

=1÷1
=1
更正:
72×
5
8
÷72×
5
8

=(72÷72)×(
5
8
×
5
8

=1×
25
64

=
25
64
72×
5
8
÷72×
5
8

=(72÷72)×(
5
8
×
5
8

=1×
25
64

=
25
64

(3)(
3
5
-
2
7
)×5×7
=
3
5
×5-
2
7×7
         
=3-2
=1
更正:
3
5
-
2
7
)×5×7
=
3
5
×5×7-
2
7
×5×7
=21-10
=11
3
5
-
2
7
)×5×7
=
3
5
×5×7-
2
7
×5×7
=21-10
=11

(4)
8
15
÷(
8
15
+
4
5
)

=
8
15
÷
8
15
+
8
15
÷
4
5

=1+
2
3

=1
2
3

更正
8
15
÷(
8
15
+
4
5
)

=
8
15
÷
4
3

=
2
5
8
15
÷(
8
15
+
4
5
)

=
8
15
÷
4
3

=
2
5

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科目:小学数学 来源: 题型:039

(1)1.45×10=

(2)1.45×100=

(3)1.45×1000=

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