题目内容

直接写出计算或估算结果.
2007-619=
5÷0.01=0.46×10=78×63≈
1
4
+
1
3
=
4-
2
5
=
3
20
×
5
24
=
______
3
5
=
1
8
2007-619=1388,5÷0.01=500,0.46×10=4.6,78×63≈4800,
1
4
+
1
3
=
7
12
4-
2
5
=3
3
5
3
20
×
5
24
=
1
32
3
40
3
5
=
1
8
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