早教吧 育儿知识 作业答案 考试题库 百科 知识分享

计算(能简算的要简算).34×34+14×0.75-75%[1-(0.25+0.375)]÷0.25.

题目详情
计算(能简算的要简算).
3
4
×
3
4
+
1
4
×0.75-75%
[1-(0.25+0.375)]÷0.25.
▼优质解答
答案和解析
(1)
3
4
×
3
4
+
1
4
×0.75-75%,
=
3
4
×
3
4
+
1
4
×
3
4
3
4

=
3
4
×(
3
4
+
1
4
−1),
=
3
4
×0,
=0.
(2)[1-(0.25+0.375)]÷0.25.
=[1-0.625]÷0.25,
=0.375÷0.25,
=1.5.