3
4
×4=
22
13
×
13
11
=
1
5
+
1
4
=
2
3
×
1
4
=
11
26
×
13
11
=
2
3
÷
3
4
=
13
11
=
1
2
×
1
4
=
0×10=
7
10
×
5
2
=
2
3
+
1
6
=
7
8
-
3
8
=
3
4
=
7
10
÷
2
5
=
1
3
×4=
2
7
+
1=
1
3
+
4
9
=
9
10
-
3
5
=
1÷(
2
9
-
1
9
)=
1
4
×4=
分析:根據(jù)分?jǐn)?shù)四則混合運(yùn)算的順序,按照分?jǐn)?shù)四則運(yùn)算的計(jì)算法則,直接進(jìn)行口算即可.
解答:
解:
3
4
×4=3;
22
13
×
13
11
=2;
1
5
+
1
4
=
9
20
;
2
3
×
1
4
=
1
6
;
11
26
×
13
11
=
1
2
;
2
3
÷
3
4
=
8
9
13
11
=0;
1
2
×
1
4
=
1
8
0×10=0;
7
10
×
5
2
=1
3
4
;
2
3
+
1
6
=
5
6
7
8
-
3
8
=
1
2
;
3
4
=0;
7
10
÷
2
5
=1
3
4
;
1
3
×4=1
1
3
;
2
7
+
1=1
6
7
;
1
3
+
4
9
=
7
9
;
9
10
-
3
5
=
3
10
1÷(
2
9
-
1
9
)=9;
1
4
×4=64.
點(diǎn)評(píng):此題考查的目的是牢固掌握分?jǐn)?shù)四則混合運(yùn)算的順序和分?jǐn)?shù)四則運(yùn)算的計(jì)算法則,并且能夠正確熟練地進(jìn)行口算.
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