问题 解答题
口算
36+45=120-60=90×6=3000×8=
80+250=150×0=92-6=34+18=
56÷7=800×2=50÷7=35-5=
1
4
+
2
4
=
7
8
-
2
8
=
3
7
+
4
7
=
1-
1
3
=
89×7≈196×5≈613×8≈70+140=
78-24=500×3=1500+700=220-150=
答案

36+45=81,120-60=60,90×6=540,3000×8=24000,
80+250=330,150×0=0,92-6=86,34+18=52,
56÷7=8,800×2=1600,50÷7=7…1,35-5=30,
1
4
+
2
4
=
3
4
7
8
-
2
8
=
5
8
3
7
+
4
7
=1,
1-
1
3
=
2
3
89×7≈630,196×5≈1000,613×8≈4800,70+140=210,
78-24=54,500×3=1500,1500+700=2200,220-150=70.

选择题
单项选择题