问题 解答题

用递等式计算:

56.7-(34.5+1.23)

130×25-480÷12

2340-512÷32×23.

答案

(1)56.7-(34.5+1.23)

=56.7-35.73

=20.97;

(2)130×25-480÷12

=3250-40

=3210;

(3)2340-512÷32×23

=2340-16×23

=2340-368

=1972.

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