口算:
1
4
+
1
6
=
1
2
+
1
3
=
4-
2
5
=
1-
1
6
-
1
3
=
0.8+0.8×99= 35×
3
14
=
24÷
3
8
=
3
10
×
5
6
=
1
2
=
1-
1
5
+
4
5
=
分析:利用分?jǐn)?shù)、小數(shù)加、減、乘、除四則運(yùn)算的方法及簡(jiǎn)便運(yùn)算進(jìn)行計(jì)算.
解答:解:
1
4
+
1
6
=
5
12
      
1
2
+
1
3
=
5
6
      4-
2
5
=3
3
5
      1-
1
6
-
1
3
=
1
2

0.8+0.8×99=80        35×
3
14
= 7
1
2
     24÷
3
8
=64
    
3
10
×
5
6
=
1
4

1
2
=4
     1-
1
5
+
4
5
=1
3
5
(或
8
5
)
點(diǎn)評(píng):考查學(xué)生的四則運(yùn)算的計(jì)算能力.
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