问题 解答题
口算题,轻松又愉快.
251+149=
72÷0.8=10-0.91=1.5×0.5=
10÷0.2=560÷16÷5=0.25-
1
5
=
4×25-25=
0.333×3≈4.78-2.11-0.89=1-
3
7
+
4
7
=
1
3
-
1
3
÷1=
答案

251+149=400,72÷0.8=90,10-0.91=9.09,1.5×0.5=0.75,
10÷0.2=50,560÷16÷5=7,0.25-
1
5
=0.05,
4×25-25=75,
0.333×3≈1,4.78-2.11-0.89=1.78,1-
3
7
+
4
7
=
8
7
1
3
-
1
3
÷1=2
2
3

单项选择题
单项选择题