问题 解答题

用递等式计算:

(102-59)×63

25×40÷20

77×26-1000.

答案

(1)(102-59)×63,

=43×63,

=2709;

(2)25×40÷20,

=1000÷20,

=50;

(3)77×26-1000,

=2002-1000,

=1002.

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