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=14+24=78-28=37+47=1-13=89×7≈

题目简介

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=14+24=78-28=37+47=1-13=89×7≈

题目详情

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=
题型:解答题难度:中档来源:不详

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,
class="stub"1
4
+class="stub"2
4
=class="stub"3
4
class="stub"7
8
-class="stub"2
8
=class="stub"5
8
class="stub"3
7
+class="stub"4
7
=1,
1-class="stub"1
3
=class="stub"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.

更多内容推荐