题目内容
【题目】口算下面各题.
﹣
=
+
=
﹣
= 2÷
=
×6=
÷
=
×6=
×
=
﹣
=
÷
=
÷
=
×
=
×
=
÷
=
÷
= 6.4÷0.08= 4﹣2.92=
÷
=
【答案】;
;
;8;
;
;2;
;
;
;
;
;
;
;
;80;1.08;
.
【解析】
试题分析:(1)(2)(3)(9)通分计算;(4)(6)(10)(11)(14)(15)(18)把除法改为乘法,再计算;(5)(7)(8)(12)(13)属于分数乘法,该约分的要约分;(16)把被除数和除数分别扩大100倍,再相除;(17)注意数位对齐.
解:﹣
=
;
+
=
;
﹣
=
; 2÷
=8;
×6=
;
÷
=
;
×6=2;
×
=
;
﹣
=
;
÷
=
;
÷
=
;
×
=
;
×
=
;
÷
=
;
÷
=
; 6.4÷0.08=80; 4﹣2.92=1.08;
÷
=
.

练习册系列答案
相关题目