看誰算得又準(zhǔn)又快.
10-0.9=
8.2+0.54+0.46=
4
5
-
1
3
=
7
15
11
12
-
5
6
+
1
12
=
3
8
×
2
5
=
26.26÷26= 4.57+6.43= 7.9×11-7.9=
3.14×32= 3+
3
4
-3+
3
4
=
10.1×30= 2÷0.2-2=
3
4
×
3
8
=
1.8×4×0.5= 1.5-1.5×0.2= 578+216=
85.2-3.25= 3.2-
1
2
=
2
9
×81=
1
2
+
1
3
=
分析:根據(jù)小數(shù)、分?jǐn)?shù)加減乘除法的計算方法進(jìn)行計算.
8.2+0.54+0.46根據(jù)加法結(jié)合律進(jìn)行簡算;
7.9×11-7.9根據(jù)乘法分配律進(jìn)行簡算;
1.8×4×0.5根據(jù)乘法結(jié)合律進(jìn)行簡算.
解答:解:
10-0.9=9.1 8.2+0.54+0.46=9.2
4
5
-
1
3
=
7
15
11
12
-
5
6
+
1
12
=
1
6
3
8
×
2
5
=
3
20
26.26÷26=1.01 4.57+6.43=11 7.9×11-7.9=79
3.14×32=28.26 3+
3
4
-3+
3
4
=1
1
2
10.1×30=303 2÷0.2-2=8
3
4
×
3
8
=
9
32
1.8×4×0.5=3.6 1.5-1.5×0.2=1.2 578+216=794
85.2-3.25=81.95 3.2-
1
2
=2.7
2
9
×81=18
1
2
+
1
3
=
5
6
點評:口算時,注意運算符號和數(shù)據(jù),然后再進(jìn)一步計算.
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:

看誰算得又準(zhǔn)又快.
4
5
×
1
4
=
3
7
×
7
10
=
0.9-
9
10
=
10-
3
4
-
1
4
=
2
3
×12=
14×
3
7
=
1
2
+
1
4
=
2
3
×
5
8
=
4
7
+
4
7
=
1-
8
9
=
1
9
1
2
+
1
5
+
1
2
=
3.6×0.2=
360÷45= 80÷16= 55÷0.001= 55×0.001=
2400÷30= 1.3-0.7= 0.49+0.16= 2.6×0.4=

查看答案和解析>>

科目:小學(xué)數(shù)學(xué) 來源: 題型:

看誰算得又準(zhǔn)又快.
2
3
÷
4
15
=
2
1
2
2
1
2
4
7
÷
1
14
=
8
8
4
27
÷
8
9
=
1
6
1
6
8
15
÷
16
35
=
1
1
6
1
1
6
5
9
÷3=
5
27
5
27
30÷
3
8
=
80
80
16
35
÷
4
7
=
4
5
4
5
5
18
÷
12
27
=
5
8
5
8
3÷0.5=
6
6
          
10÷25=
0.4
0.4
         
4.8÷0.16=
30
30
       
0÷3.89=
0
0
3.52÷1=
3.52
3.52
      
37.2×99+37.2=
3720
3720
 
6.4÷4﹦
1.6
1.6
     
1.5÷0.3﹦
5
5
1×0.4÷1×0.4=
0.16
0.16
  
1.8×5﹦
9
9
 
7.2÷0.9﹦
8
8
    
25×4÷0.25×4=
1600
1600

查看答案和解析>>

科目:小學(xué)數(shù)學(xué) 來源: 題型:

看誰算得又準(zhǔn)又快.
1
2
-
1
3
=
1
6
1
6
7
16
×
16
7
=
1
1
3.6÷0.06=
60
60
2
21
-
2
21
=
2
3
2
3
1
4
÷
1
4
=
1
1
15÷
3
5
=
25
25
4
9
×
9
16
÷
7
16
=
4
7
4
7
1
2
+0.5)×(
1
2
-0.5)=
0
0
2.2×6﹦
13.2
13.2
    
8.4÷0.4﹦
21
21
      
9÷5-4÷5﹦
1
1
       
4.5÷0.9﹦
5
5
2.5×4﹦
10
10
     
 25×3.3×0﹦
0
0
      
25×40﹦
1000
1000
       
0.3÷0.1﹦
3
3
4.5×2=
9
9
       
4÷4%=
100
100
        
7.8+0.22=
8.02
8.02
       
2-0.64-0.36﹦
1
1

查看答案和解析>>

科目:小學(xué)數(shù)學(xué) 來源: 題型:

看誰算得又準(zhǔn)又快.
13×(2+
7
13
)=
341-103= 24.06+0.4=
3
8
-
1
3
=
5
6
-
1
5
)×30=
4
5
×25=
1
12
×6=
2.8×25+12×2.5= 12.5×32×2.5=
3
5
×1=

查看答案和解析>>

同步練習(xí)冊答案