69+18+23+31+82=________.

223
分析:通過觀察,此題運(yùn)用加法交換律與結(jié)合律簡(jiǎn)算.
解答:69+18+23+31+82,
=(69+31)+(18+82)+23,
=100+100+23,
=223;
故答案為:223.
點(diǎn)評(píng):完成此題,注意分析式中數(shù)據(jù),運(yùn)用合適的運(yùn)算定律簡(jiǎn)算.
練習(xí)冊(cè)系列答案
相關(guān)習(xí)題

科目:小學(xué)數(shù)學(xué) 來源: 題型:

口算.
7.6+2
1
5
=
0.875-
5
8
=
6.8×0.1= 3.6÷1.2=
 1.5÷
5
13
=
3
4
×2.4=
12
7
÷
6
7
=
0.35+9
13
20
=
 9×300%= 1.69÷1.3= 12.5×88= 10.7×10=
 2.3×102= 5-1
4
9
=
0.5+
1
8
=
2
3
÷
2
3
=
1
5
6
×10=
5
18
÷1
2
3
=
1
2
5
÷14%=
1
8
=
8π= 122= ( 
1
2
3=
2×π×6=
3.14×(102-82)= 40×99= 1
1
4
×101=
1÷25%=
 16×62.5%=  3.6÷1
2
7
=
5÷5×
1
5
=
 2+2÷5=
7
10
÷
7
10
=
5
6
+
1
6
×2=
125×27×8= 015:4.5=
6:1
5
7
=
1
1
8
:2.5=
1
2
-
1
6
)×30=
 6×
1
5
×6÷
1
5
=

查看答案和解析>>

科目:小學(xué)數(shù)學(xué) 來源: 題型:

準(zhǔn)確計(jì)算:
42×
9
28
9
44
×11
6
5
×15
3
13
×
26
37
18
21
×
7
9
       
23
24
×
8
69
3
4
7
×28
5
6
+
1
5
×
2
3
9
10
×(
5
3
+
2
3
15×
1
15
-
3
4
3
4
-
1
2
)×12
17
18
×36+
5
6
18-16×
3
4
3
7
×(
1
2
-
1
6
3
4
×
2
3
-
3
10
12×(
1
4
+
5
6
1
6
×
2
5
-
1
20
3
4
-
1
3
)×24
2
5
×4+
2
5
3
4
×9-
3
4
5
12
×
8
7
-
1
7
×
5
12
5
8
×
6
7
-
5
8
×
2
7
91×
7
90
5
12
×13-
5
12
69×(
7
23
×
2
15
79
80
×81
16.87-
2
7
+3.23-
5
7

查看答案和解析>>

科目:小學(xué)數(shù)學(xué) 來源: 題型:

直接寫得數(shù):
12÷
3
4
=
5
12
×30=
1
2
÷
3
4
=
16×
1
2
=
1
8
÷
1
8
=
4
5
÷4=
5
8
÷
1
4
×1=
2
3
÷
1
6
×
1
6
=
1
10
÷3=
6
9
÷6=
7
10
÷3=
2
3
÷
1
2

查看答案和解析>>

科目:小學(xué)數(shù)學(xué) 來源: 題型:

7×5
5
14
=
5
8
÷
2
3
=
1
6
+
2
5
=
2
3
×
3
4
=
1+
1
2
-0.4=
1
4
+0.75=
1
3
+
2
9
=
6
7
÷9=
1
4
+
1
2
=
5
6
×0.4=
8
9
=
1
9
×
1
9
=
(2+
2
5
)×(1+
1
4
)=
2
3
×9=
6
9
+
1
6
=
1
3
=
1
2
+1
1
3
=
5-(2+
3
8
)=
4.5÷
1
4
=
39×
4
13
=
11×(10+
1
11
)=
11+(3+
2
3
)=
3
5
×
5
6
=
3
4
=
12-(6+
3
4
)=
1÷(1+
3
4
)=
20÷20%=
1÷0.01= 1.12= 9.9÷(1+
4
5
)=
81÷
5
9
=
1.65-0÷1.65=
2
3
×
4
9
×
1
2
=
5-1.4-1.6= (0.18+0.9)÷9=
3
10
×1.25=
1.25×0.16×8=
5
8
+7.3÷10%=
5
8
+9-0.2=
5.08-0.74-1.26=
1
4
×0.2=
1-.0375÷
5
8
=
8÷0.5+
1
4
×(1+
1
4
)=
1
12
+
5
6
)×24=
10(3+
1
7
)÷(3+
1
7
)=
(3+
1
2
+5+
1
3
+2+
1
2
)-(5+
1
3
)=
2
5
+
1
5
÷
2
5
+
1
5
=
1-
3
10
-
2
5
=
3-(2+
4
9
)+(2+
4
9
)=
3
8
-
3
8
÷3=
0×(3+
2
9
)+(1+
2
5
)=
1
6
+
1
7
-
1
6
+
1
7
=
0.125×64×0.125=
5
4
×8+8×
1
4
=
3
8
+
3
4
×16=
5
9
-
5
6
+
4
9
=

查看答案和解析>>

科目:小學(xué)數(shù)學(xué) 來源: 題型:

計(jì)算,能簡(jiǎn)算的要簡(jiǎn)算
5.5×13.3+6.7×5.5 3.69÷(1.23×1.5 ) 1.25×50×0.2×0.8
3.78×0.25+2.58 9.09-22.78÷3.4 (20-18.8 )×0.6+0.4

查看答案和解析>>

同步練習(xí)冊(cè)答案