问题 解答题
口算.
800-250=30×40=8100÷900=10-0.98=105÷7=560+770=
0.25×0.4=6.3÷0.07=0.64÷8=8.85×10=4.73+0.7=
3
9
+
7
9
=
5
8
×
4
10
=
5
6
÷3
=
5
8
-
1
2
=
3.6×
1
4
=
8×1.36×1.25=7.2×2.8+2.8×0.8=
答案

800-250=550,30×40=1200,8100÷900=9,10-0.98=9.02,105÷7=15,560+770=1330,
0.25×0.4=0.1,6.3÷0.07=90,0.64÷8=0.08,8.85×10=88.5,4.73+0.7=5.43,
3
9
+
7
9
=
10
9
5
8
×
4
10
=
1
4
5
6
÷3
=
5
18
5
8
-
1
2
=
1
8
3.6×
1
4
=0.9,
8×1.36×1.25=13.6,7.2×2.8+2.8×0.8=22.4.

问答题 简答题
问答题 简答题