2×5= 4.2-1.8= 12.5×8= 3.54×10=
70×50= 2.15+1.85= 0÷0.25= 2÷0.4=
9÷6= 7x-2.8x=
分析:(1)、(5)、(9)根據(jù)整數(shù)乘除法的計算法則計算,(2)、(6)、(10)根據(jù)小數(shù)加減法的計算法則計算,(3)、(4)、(7)、(8)根據(jù)小數(shù)乘除法的計算法則進(jìn)行計算;據(jù)此可解答.
解答:
解:2×5=10, 4.2-1.8=2.4, 12.5×8=100, 3.54×10=35.4,
70×50=3500, 2.15+1.85=4, 0÷0.25=0, 2÷0.4=5,
9÷6=1.5, 7x-2.8x=4.2x.
故答案為:10,2.4,100,35.4,3500,4,0,5,1.5,4.2x.
點(diǎn)評:本題考查了學(xué)生基本的計算能力.注意本題中含字母的式子7x-2.8x的算法.
練習(xí)冊系列答案
相關(guān)習(xí)題

科目:小學(xué)數(shù)學(xué) 來源: 題型:

2×5= 4.2-1.8= 12.5×8= 3.54×10= 5.2+0.8=
2.15+1.85= 0÷0.25= 2÷0.4= 9÷6= 70×50=

查看答案和解析>>

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
    650-470=
180
180
    79+2.1=
81.1
81.1
    
(4)3.14×3=
9.42
9.42
      6.7+3.4=
10.1
10.1
   2.01×0.4=
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
   7×0.08=
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
   0.72÷6=
0.12
0.12
   3.9÷1.3=
3
3

(7)0.8×0.8=
0.64
0.64
   5.88+3.12=
9
9
   1.9+2.1=
4
4
   26÷2.6=
10
10
  
(8)340÷17=
20
20
   9.3÷0.3=
31
31
  13×4=
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
50
   4×0.125=
0.5
0.5

(11)340+120=
460
460
    
1
4
+
1
2
=
3
4
3
4
   2.5÷5=
0.5
0.5
   4.95×10=
49.5
49.5
   
(12)12-
1
2
-
1
2
=
11
11
   1÷0.25=
4
4
  5×0.13=
0.65
0.65
   12×0.05=
0.6
0.6

(13)3.08÷0.1=
30.8
30.8
   0.35×6=
2.1
2.1
   25÷0.5=
50
50
   1.5×3=
4.5
4.5

(14)4.3-2.7=
1.6
1.6
   8.1÷0.9=
9
9
   12÷1.2=
10
10
   0.48÷6=
0.08
0.08

(15)2.6÷26=
0.1
0.1
  0.72×5=
3.6
3.6
     4.8+3.2=
8
8
   5.7÷0.3=
19
19

查看答案和解析>>

科目:小學(xué)數(shù)學(xué) 來源: 題型:

口算.
1.3×6=
1.2×9= 2.5×4= 7×1.2= 6×2.1=
3×4.8= 2.3×8= 1.5×8= 3.2×3= 4×2.2=
5×2.6= 7×1.7= 1.5×4= 2.4×3= 1.8×4=

查看答案和解析>>

科目:小學(xué)數(shù)學(xué) 來源: 題型:

(2012?西城區(qū))
37-21= 850÷100=
3
4
+
2
5
=
5
6
÷
5
4
=
4
9
-
5
18
=
4
9
×12
=
12×5= 4.4×1.1=
1
4
×
1
4
=
16
35
×
5
36
=
36÷3= 3-2.55=
7
15
÷
7
5
=
9
4
÷
3
8
=
210×10=
5
8
+
3
8
=
2
3
×
6
11
=
0.95=
95
95
%           
9.5-8.7=
6
7
-
1
7
=
19
22
=
1.12=
112
112
%          
0.6+0.13=
3
5
+
3
5
=
7
8
=
2
5
=
40
40
%        
0.4×0.9=
1
2
-
1
3
=
3
8
÷
1
3
=
11
50
=
22
22
%        
2.4÷0.3=
2
3
+
1
6
=
17
24
×24=
75%=
(     )
(     )
1.2-1.16=
7
4
-
1
2
=
9÷8= 15%=
(     )
(     )

查看答案和解析>>

科目:小學(xué)數(shù)學(xué) 來源: 題型:解答題

4.7+2.3=4.5×2=6.9-2.5=7.2×0.8=
6×3.4=0.62-0.32=1.4×0.5=0.75×100=
0.02×0.5=3.6÷0.3=6.3÷7=5.6÷100=
0.75÷0.25=0.125×8=4.8÷0.3=0.96÷2=
0.56÷28=0.36÷0.4=0.64÷0.8=0.72÷3.6=
3.6÷24=0.8×1.1=7.2+12.8=46.7-3.8=
12.8÷4=5.2÷13=12.5÷5=1.64÷41=
10÷20=24÷15=8.65×10=0.35×0.6=
3.08×0.01=4.95×1000=6.9×0.1=0.4×0.5=
2.4÷0.8=10.8÷9=9.6÷0.8=0.108÷2=
4.95÷0.9=9.65÷0.1=0.325×100=2.5×8=
0.56÷0.7=0.125×4=3.28×0.1=3.9÷0.13=
7.2×0.1=0.01×0.1=0.25×0.4=1.6÷0.8=
1÷2.5=1.25×0.8=3.2÷0.04=0÷1.7=
0.22×102=9.6÷0.8=5×0.24=4.5-0.05=
3.9÷0.1316.5÷0.5=5×0.12=24×0.5=
4.8×0.5=2.8+4.2=0.84÷2.1=5÷0.25=
7.8÷0.01=5.4÷0.6=3.2÷5=7×0.62=
0.56÷0.8=7.4-2.8=0.18÷0.2=0.16÷8=
4.5×0.02=8+7.2=1.2×30=0.012×0.2=
7.3×0.3=9÷6=3.6÷0.12=7.8÷0.6=
2÷5=4.5+5=0.3÷0.6=0.96÷0.2=
10.5×0.4=7.3+0.27=8×0.125=0.54÷0.6=
0.61+0.39=0.56÷28=10÷20=4.08÷0.4=
11-9.4=0.8×0.11=0.72+12.8=5.6÷0.01=
2.3×100=0.75×100=0.108÷2=10.8÷9=
0.7÷0.8=16-5.07=4.2×0.4=0.72×6=
12÷0.5=5.2×0.4=12.2÷0.2=5.6÷100=
0.41+3.7=0.02×0.5=7.2-0.8=1.4×0.5=
84÷0.21=0.75÷0.25=2.5×16=0.108÷2=
1.75+32.5=16-5.07=5.2÷13=1.64÷41=
1.02×0.2=0.26×0.3=8.4×0.02=1.29×6=
0.8×0.05=12.6÷0.03=8.71÷0.1=21÷0.21=
0.8×0.13=0.34÷17=8.08÷0.4=0.5×2.2=
1.24÷4=3.27+0.63=5.02×0.3=0.3×0.5=
6.4÷4=7.2÷1.8=0.7÷0.35=0.72÷1.44=
0.48÷0.04=1.25÷2.5=5.5+55=16.8÷8=
0.54+2.2=3.5-0.05=2÷0.02=0.25×40=
1.5×0.6=0.32÷0.8=12.25÷0.5=73.5×0.1=
46.5+52.5=0.45×102=1.25×88=2.64+3.85+1.54=
8×1.25=5.6÷3.5=4.2÷0.7÷6=0.4×8.6×25=
0.27÷0.3=2.5×101=0.65×101-0.65=2.6×7÷2.6×7=

查看答案和解析>>

同步練習(xí)冊答案