口算.220+60=780-290=990+990=55÷8=50×5=73÷9=600×8=37÷4=6×23=41×6=312×3=13+13=45-15=57+27=36+26=710-510+

题目简介

口算.220+60=780-290=990+990=55÷8=50×5=73÷9=600×8=37÷4=6×23=41×6=312×3=13+13=45-15=57+27=36+26=710-510+

题目详情

口算.
220+60=
780-290=990+990=55÷8=50×5=
73÷9=600×8=37÷4=6×23=41×6=
312×3=
1
3
+
1
3
=
4
5
-
1
5
=
5
7
+
2
7
=
3
6
+
2
6
=
7
10
-
5
10
+
3
10
=
题型:解答题难度:中档来源:不详

答案

220+60=280,780-290=490,990+990=1980,55÷8=6…7,50×5=250,
73÷9=8…1,600×8=4800,37÷4=9…1,6×23=138,41×6=246,
312×3=936,class="stub"1
3
+class="stub"1
3
=class="stub"2
3
class="stub"4
5
-class="stub"1
5
=class="stub"3
5
class="stub"5
7
+class="stub"2
7
=1,
class="stub"3
6
+class="stub"2
6
=class="stub"5
6
class="stub"7
10
-class="stub"5
10
+class="stub"3
10
=class="stub"1
2

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