口算.1÷45=11-49=13+14=12÷3=0.125×8=12×45=0.37+1.3=12÷18=4-78-18=2008×99+2008=-数学

题文

口算.
4
5
=
11-
4
9
=
1
3
+
1
4
=
1
2
÷3=
0.125×8=
1
2
×
4
5
=
0.37+1.3=
1
2
÷
1
8
=
4-
7
8
-
1
8
=
2008×99+2008=
题型:解答题  难度:中档

答案

4
5
=
5
4
11-
4
9
=10
5
9
1
3
+
1
4
=
7
12
1
2
÷3=
1
6
0.125×8=1,
1
2
×
4
5
=
2
5
0.37+1.3=1.67,
1
2
÷
1
8
=4,
4-
7
8
-
1
8
=3,
2008×99+2008=200800.
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