6.4÷0.8=______÷8 20.5÷0.25=______÷25.
6.4÷0.8,
=(6.4×10)÷(0.8×10),
=64÷8;
20.5÷0.25,
=(20.5×100)÷(0.25×100),
=2050÷25;
故答案為:64,2050.
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科目:小學(xué)數(shù)學(xué) 來源: 題型:

口算
(1)70×80=
5600
5600
        3.7×0.5=
1.85
1.85
     3.2×100=
320
320
      8.9-3.8=
5.1
5.1

(2)3.8+2.5+6.2=
12.5
12.5
    12-6.2-3.8=
2
2
   1.7+0.43+3.3=
5.43
5.43
    3.4-1.5-0.5=
1.4
1.4

(3)
8
9
+
1
9
--
2
7
=
5
7
5
7
     1.4×5=
7
7
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180
180
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81.1
81.1
    
(4)3.14×3=
9.42
9.42
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10.1
10.1
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0.804
0.804
   
6
13
+
7
13
=
1
1

(5)3.99+5.2=
9.19
9.19
   23+6.68=
29.68
29.68
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0.56
0.56
    0.25×0.4=
0.1
0.1

(6)22×0.2=
4.4
4.4
   99.9+1=
100.9
100.9
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0.12
0.12
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3
3

(7)0.8×0.8=
0.64
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9
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4
4
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10
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(8)340÷17=
20
20
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31
31
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52
52
   3.6×5=
18
18

(9)1.5×4=
6
6
   20×16=
320
320
   28×3=
84
84
   3.2÷4=
0.8
0.8
 
(10)0.28×100=
28
28
   3200÷1000=
3.2
3.2
   0.5×100=
50
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(11)340+120=
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1
4
+
1
2
=
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4
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1
2
-
1
2
=
11
11
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4
4
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0.65
0.65
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0.6
0.6

(13)3.08÷0.1=
30.8
30.8
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2.1
2.1
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50
50
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4.5
4.5

(14)4.3-2.7=
1.6
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9
9
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10
10
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0.08
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科目:小學(xué)數(shù)學(xué) 來源: 題型:

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3
7
-(
1
2
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3
7
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1
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4
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5
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12
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13
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14
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2
3
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11
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8
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5
11
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2
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1
4
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2
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1
4
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17
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1
3
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9
8
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5
8
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8
9
×[
3
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2
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7
30
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1
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5
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4
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3
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25
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23
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3
4
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7
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11
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7
+
7
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7
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2
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3
8
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3
8
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8
5
+
8
3
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5
8
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13
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13
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13
16
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3
8
+
3
11
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36
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1
9
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3
7
÷
7
11
+
4
7
÷
7
11
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4
5
×(10+
5
6
(99)(21+
7
15
)÷
7
5
(100)
7
13
×
3
4
6
13
(101)
5
2
÷
4
17
+
3
2
÷
4
17
(102)(
5
18
-
5
24
)÷
5
6
(103)
2
3
×
7
3
+
4
5
+
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25
17
_
1
3
×
9
8
-
5
8
(105)
12
7
-(
1
3
÷
7
15
+
4
13
(106)
5
7
+
9
8
×
5
9
+
3
8
(107)1-
5
8
÷
25
28
-
3
10
(108)
1
4
×
3
7
+÷4
(109)5-(4+
6
13
(110)1125-997 (111)7.46-0.83-2.17 (112)12.85-1.17-8.83+1.15 (113)4.5×102
(114)0.4×6.3×25 (115)(4.9+4.9+…+4.9)×2.5(16個(gè)4.9相加) (116)7.5×199 (117)(
1
9
+
1
12
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2
45
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3
11
+
5
12
+
8
11
+
7
12
(125)
12
7
-(
1
3
÷
7
15
+
4
13
(126)3×(
1
12
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2
15
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3
4
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2
×
1
4
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16
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16
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45
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13
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5
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3
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3
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8
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8
9
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科目:小學(xué)數(shù)學(xué) 來源: 題型:解答題

3.3×2=2.4×0.5=0.6×0.9=0.2×0.3=
0.39+0.61=10-7.2=0.88+1.1=0.75×4=
11-1.5=4.48-4=7.8-0.8=2.8×5=
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0.32+1.68=8×125=7.28+7=0.8+39.2=
43+0.01=0.4×2=1.5×6=1×0.04=
1.53-0.5=1.5-0.6=0.3+1.5=95÷5=
0.65+4.35=14-7.4=11.2-9.8=4.4×2=
35-25=56-26=45+15=35-15=
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78-38=29+29=58-48=15+45=
0.9×125×8=5.75+1.37+4.25=0.43×10+5.7=62-2.8-1.2=
2.7×4+2.7×6=0.25×0.5×4=

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