题目内容

13.4-（
3
5
+2.4÷
2
3
）÷1.5．
分析：先算小括号里面的除法，再算小括号里面的加法，然后算括号外的除法，最后算减法．
解答：解：13.4-（
3
5
+2.4÷
2
3
）÷1.5，
=13.4-（
3
5
+3.6）÷1.5，
=13.4-4.2÷1.5，
=13.4-2.8，
=10.6．
点评：本题考查了四则混合运算，计算时要先理清楚运算的顺序，然后根据运算顺序逐步求解．
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相关题目
口算
3.2×0.2             		 1.4×0.4           3.3÷3          1.2÷0.3
2.5×0.4             1.5×2            0.7×7           7.3+0.3
0.53-0.3             1.8×0.5           0.9×0.01        0.23×3
（5）2-1.2               7.8÷6             8.4÷0.21         8.4÷0.7
5.6+3.6            9-2.35              0.56÷8         1.23×3
5.6÷0.4            4.5÷0.9            8.1×2          90÷3
1.23+3             5.6+1.23           4.5×2          5.6÷1.4
4.8÷1.2           7.2÷0.9           6.6÷1.1          7.2÷6
2.1÷3             0.6×0.5           3.23×2          1.8÷3
12.5÷0.1          0.32÷0.8          1.6+3.7           0.45×0.2
0.36÷1.8          0.4×0.5            8.4+5.6         8.4÷2.1
4.8÷0.08          4.8÷0.8            3+2.3           9.3÷3
0.01×8           7.31×100          0.09×6         0.8×0.6
1.25×8            3÷5               2.3+2.3         6.23+3.6
3.2×0.2= 1.4×0.4= 3.3÷3= 1.2÷0.3= 0.56÷8=
2.5×0.4= 1.5×2= 0.7×7= 7.3+0.3= 1.23×3=
0.53-0.3= 1.8×0.5= 0.9×0.01= 0.23×3= 1.6÷0.04=
2-1.2= 7.8÷6= 8.4÷0.21= 8.4÷0.7= 1.23×3=
5.6+3.6= 9-2.35= 0.56÷8= 7.3+2.7= 4.8÷1.2=
5.6÷0.4= 4.5÷0.9= 8.1×2= 90÷3= 7.2÷0.9=
1.23+3= 5.6+1.23= 4.5×2= 5.6÷1.4= 6.6÷1.1=
2.1÷3= 0.6×0.5= 3.23×2= 1.8÷3= 7.2÷6=
12.5÷0.1= 0.32÷0.8= 1.6+3.7= 0.45×0.2= 4.8÷0.08=
0.36÷1.8= 0.4×0.5= 8.4+5.6= 8.4÷2.1= 1.8×0.4=
0.01×8= 7.31×100= 0.09×6= 0.8×0.6= 3+2.3=
1.25×8= 3÷5= 2.3+2.3= 6.23+3.6= 9.3÷3=
4.8÷0.8= 7.5-4.5= 5.7+4.3= 0.75÷15= 1÷0.25=
1.2×60= 6÷0.2= 0.21×4= 0.25×4×9= 2.33×1.2=
0.62÷0.62-1= 5+3.2÷0.8= 7.5÷2.5×0= 3.9×0.01= 0.001+10.099=
3-0.98= 6×0.25= 0.63÷0.9= 8.95÷0.895=
列竖式计算．（带*的题要验算）
①*927÷3		 ②25×58 ③53×27
④10-4.8 ⑤35.2+13.9 ⑥915÷8．
（2012?成都）
直接写出得数．
2
3
-
1
9
=		 34+18= 52-4= 0÷
1
3
=
0.6×100= 13-9= 7.31+0.7=
5
8
×48=
10-3.9= 0.52=
3
26
×
13
48
=		 26×5=
2-
1
4
=		 5÷2%=
4
17
÷
1
4
=		 6÷
3
4
=
7.5+4.5=
3
5
-
1
2
=		 4÷0.2= 0.375÷3=
20÷8=

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