题目内容

计算下面各题,后两题请用简便方法计算.
2+0.45÷0.9-
7
8
; 
4
9
÷[
5
6
×(
4
5
-
2
3
)];
93+1.06+
7
100
+2.94;   
3.78×6.2+3.78×3.8.
(1)2+0.45÷0.9-
7
8
;,
=2+0.5-0.875,
=1.625;

(2)
4
9
÷[
5
6
×(
4
5
-
2
3
)],
=
4
9
÷[
5
6
×
2
15
],
=
4
9
÷
1
9

=
4
9
×9,
=4;

(3)93+1.06+
7
100
+2.94,
=93+(1.06+0.07+2.94),
=93+4.07,
=97.07;

(4)3.78×6.2+3.78×3.8,
=3.78×(6.2+3.8),
=3.78×10,
=37.8.
练习册系列答案
相关题目

违法和不良信息举报电话:027-86699610 举报邮箱:58377363@163.com

精英家教网