问题 解答题
直接写出结果
2
3
-
1
2
=
4.5×102=
5
9
×6=
270÷18=
5-0.25+0.75=0.42-0.32=
1
5
=
341-103=
13×(2+
7
13
)=
______:
1
7
=
1
7
10×10%=23.9÷8=
1
7
÷7×
1
7
=
4
5
×
3
5
=
答案

直接写出结果

2
3
-
1
2
=
1
6
4.5×102=459,
5
9
×6=
10
3
270÷18=15;
5-0.25+0.75=5.5,0.42-0.32=0.07
1
5
=10,
341-103=238;
13×(2+
7
13
)=33,
1
49
1
7
=
1
7
10×10%=123.9÷8=2.9875
1
7
÷7×
1
7
=
1
49
4
5
×
3
5
=
3
4

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单项选择题