用你喜欢的方法计算.68÷[0.5×(7.5-0.7)](13
来源:学生作业帮 编辑:大师作文网作业帮 分类:数学作业 时间:2024/11/10 07:46:10
用你喜欢的方法计算.
68÷[0.5×(7.5-0.7)]
(
68÷[0.5×(7.5-0.7)]
(
1 |
3 |
(1)68÷[0.5×(7.5-0.7)]
=68÷[0.5×6.8]
=68÷3.4
=20;
(2)(
1
3+
1
6+
1
9)÷
1
36
=(
1
3+
1
6+
1
9)×36
=
1
3×36+
1
6×36+
1
9×36
=12+6+4
=18+4
=22;
(3)
1
8×[
1
2÷(
3
5×
10
9)]
=
1
8×[
1
2÷
2
3]
=
1
8×
3
4
=
3
32;
(4)2014×
2012
2013
=(2013+1)×
2012
2013
=2013×
2012
2013+1×
2012
2013
=2012+
2012
2013
=2012
2012
2013.
=68÷[0.5×6.8]
=68÷3.4
=20;
(2)(
1
3+
1
6+
1
9)÷
1
36
=(
1
3+
1
6+
1
9)×36
=
1
3×36+
1
6×36+
1
9×36
=12+6+4
=18+4
=22;
(3)
1
8×[
1
2÷(
3
5×
10
9)]
=
1
8×[
1
2÷
2
3]
=
1
8×
3
4
=
3
32;
(4)2014×
2012
2013
=(2013+1)×
2012
2013
=2013×
2012
2013+1×
2012
2013
=2012+
2012
2013
=2012
2012
2013.