问题 解答题

18×14÷78

(45+310)÷310

56÷(12+56)

34÷1516÷56.

答案

(1)18×14÷78,

=252÷78,

=

42
13

(2)(45+310)÷310,

=45÷310+310÷310,

=

9
62
+1,

=1

9
62

(3)56÷(12+56),

=56÷68,

=

14
17

(4)34÷1516÷56,

=

17
758
×
1
56

=

17
42448

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