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口算.21%+5%89÷48π38+34125×847×3813+1423-1234÷678÷64710×5147π23+5623×5613÷2667-31467%-24%99×5910×5623×91067÷65100÷2516×34710×52158×41534÷67667+3447÷9141112÷111412-数学

[db:作者]  2019-05-13 08:00:00  零零社区

题文

口算.
21%+5%
8
9
÷4
3
8
+
3
4
125×8
4
7
×
3
8
1
3
+
1
4
2
3
-
1
2
3
4
÷
6
7
8÷64
7
10
×
5
14
2
3
+
5
6
2
3
×
5
6
13÷26
6
7
-
3
14
67%-24%99×5
9
10
×
5
6
2
3
×
9
10
6
7
÷
6
5
100÷25
1
6
×
3
4
7
10
×
5
21
5
8
×
4
15
3
4
÷
6
7
667+34
4
7
÷
9
14
11
12
÷
11
14
1263-163
2
5
÷
5
6
9
10
×
5
6
4
7
÷
7
8
12
2
÷
3
4
98%-55%
11
15
÷
22
45
4
7
×
7
8
15.7÷3.14
6
7
-
3
14
7
9
×
5
21
7
12
÷
7
8
9
11
÷
3
22
6
7
+
3
14
4
5
÷
3
4
5
9
×
2
15
5
9
÷
2
15
2
3
×
4
9
6.28÷π
7
8
21÷5
8
9
×
4
5
14
15
÷
7
10
39×
4
13
66×10
0÷8751-
1
2
-
1
3
1
3
-
1
4
)×12
5
7
×
1
6
+
5
7
×
5
6
3-
2
9
-
7
9
题型:解答题  难度:中档

答案

21%+5%=26%
8
9
÷4=
2
9
8π=25.12
3
8
+
3
4
=
9
8
125×8=1000
4
7
×
3
8
=
3
14
1
3
+
1
4
=
7
12
2
3
-
1
2
=
1
6
3
4
÷
6
7
=
7
8
8÷64=
1
8
7
10
×
5
14
=
1
4
7π=21.98
2
3
+
5
6
=
3
2
2
3
×
5
6
=
5
9
13÷26=
1
2
6
7
-
3
14
=
9
14
67%-24%=43%99×5=495
9
10
×
5
6
=
3
4
2
3
×
9
10
=
3
5
6
7
÷
6
5
=
5
7
100÷25=4
1
6
×
3
4
=
1
8
7
10
×
5
21
=
1
6
5
8
×
4
15
=
1
6
3
4
÷
6
7
=
7
8
667+34=700
4
7
÷
9
14
=
8
9
11
12
÷
11
14
=
7
6
1263-163=1100
2
5
÷
5
6
=
12
25
9
10
×
5
6
=
3
4
4
7
÷
7
8
=
32
49
12
2
÷
3
4
=8
98%-55%=43%
11
15
÷
22
45
=
3
2
4
7
×
7
8
=
1
2
15.7÷3.14=5
6
7
-
3
14
=
9
14
7
9
×
5
21
=
5
27
7
12
÷
7
8
=
2
3
9
11
÷
3
22
=6
6
7
+
3
14
=
15
14
4
5
÷
3
4
=
16
15
5
9
×
2
15
=
2
27
5
9
÷
2
15
=
25
6
2
3
×
4
9
=
8
27
6.28÷π=2
7
8
=0
21÷5=
21
5
8
9
×
4
5
=
32
45
14
15
÷
7
10
=
4
3
39×
4
13
=12
3π=3×3.14=9.4266×10=660
0÷875=01-
1
2
-
1
3
=
1
6
1
3
-
1
4
)×12=1
5
7
×
1
6
+
5
7
×
5
6
=
5
7
3-
2
9
-
7
9
=2

据专家权威分析,试题“口算.21%+5%89÷48π38+34125×847×3813+1423-1234÷678÷64710×5147π..”主要考查你对  分数的加法和减法(异分母)  等考点的理解。关于这些考点的“档案”如下:

分数的加法和减法(异分母)

考点名称:分数的加法和减法(异分母)

  • 分数加、减计算法则:
    ①分母相同时,只把分子相加、减,分母不变;
    例如1/2+3/2=(1+3)/2=4
    ②分母不相同时,要先通分成同分母分数再相加、减。
    1/2+2/3=3/6+4/6=7/6



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