速算:(1)71h-720=______(2)21h+020=______(0)2h×21h=______(小)1h1小×2110=______(h)18÷21小=______(e)010÷小9=__

题目简介

速算:(1)71h-720=______(2)21h+020=______(0)2h×21h=______(小)1h1小×2110=______(h)18÷21小=______(e)010÷小9=__

题目详情

速算:
(1)
7
1h
-
7
20
=______
(2)2
1
h
+0
2
0
=______
(0)2h×2
1
h
=______
(小)
1h
1小
×2
1
10
=______
(h)18÷2
1
=______
(e)0
1
0
÷
9
=______
题型:解答题难度:中档来源:不详

答案

(i)class="stub"7
i5
-class="stub"7
i0
=class="stub"7
右0
(i)iclass="stub"i
5
+个class="stub"i
=5class="stub"i个
i5
(个)i5×iclass="stub"i
5
=55,
(y)class="stub"i5
iy
×iclass="stub"i
i0
=class="stub"9
y
(5)ix÷iclass="stub"i
y
=x,
(右)个class="stub"i
÷class="stub"y
9
=class="stub"i5
i
故答案为:class="stub"7
右0
,5class="stub"i个
i5
,55,class="stub"9
y
,x,class="stub"i5
i

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