题目内容

5
8
×
9
10
+
5
16
．
分析：
5
8
×
9
10
+
5
16
，先算乘法，再算加法．
解答：解：
5
8
×
9
10
+
5
16

=
9
16
+
5
16

=
7
8
．
点评：考查了分数四则混合运算，弄清运算顺序，然后再进一步计算．
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计算下列各题，能简算的要简算
13
18
×5.16+516%×
5
18
 （
8
9
-
1
3
）÷（
7
18
×
2
3
）
9
10
×
4
13
×
13
18
47
6
+
39
10
+
13
6
+6.1
4
5
÷（
1
5
+
5
8
×
4
7
）
1
8
×（0.65+
7
20
）÷
1
7
．
直接写出得数．
2
5
÷10=		 3-
5
6
=
1
4
+0.75=
5
8
×
1
5
=
1
2
÷
3
4
=
15×
5
12
=
2
7
÷2=
9
10
×
2
3
=
1
5
÷6=		 3+
5
16
=
怎样简便怎样算．
5
4
×16×
1
8
　
3
8
÷12÷
5
16
11
3
÷[（
5
6
-
3
8
）×24]
5
7
×
8
5
+
2
7
÷
5
8
5
4
+
4
9
+
2
3
×
7
3
9
10
÷（
3
5
+
9
10
）
3
4
×2=
1
6
+
1
2
=
5
9
÷5=
1
12
×
6
7
=
3
4
÷3=
5
4
×
5
4
=
5
8
÷1=		 5-
2
3
=
3
9
×12=
3
5
×
5
12
=		 4-
2
3
=
7
12
×3=
2
7
÷14=		 8+
3
5
=		 0×
13
30
=		 39×
3
13
=
8×
1
2
=
5
6
÷
3
4
=		 4×
12
7
=		 20÷
4
5
=
1-
9
10
=		 2.5×16=
5
12
÷
1
6
=
3
2
×
4
5
=
8
15
÷24=		 11÷
22
8
=
1
2
÷
3
8
=
4
7
÷
2
3
=
3
4
+
1
7
=		 1.5÷0.05= 0×
1
9
×9=		 1.5÷0.05=
5
8
÷
7
12
=
4
5
×
2
3
×
5
6
=
5
9
×
2
5
=		 2.5×0.4=
14×
5
16
=		 (
1
2
+
1
3
)×12=
14
33
×
3
7
=		 0×
7
9
=
5
8
×
5
8
=
5
21
+
4
7
=
7
9
÷7=		 2-
1
4
=
3
5
-
1
8
=
4
21
÷
8
7
=
2
3
-
1
4
=		 6.25+1.75=
1
2
÷
7
18
=
9
10
×6=
1
8
+
1
9
=
3
4
÷
4
3
=
1
2
×
2
3
=		 12-
5
7
=		 1÷
2
5
=
2
9
÷18=
7
28
÷
2
9
=		 10×1×
2
5
=		 20÷
4
5
=
1
3
×9+9×
2
3
=
42÷
21
23
=
3
8
÷12=

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