问题 解答题
递等式计算.
195-(45+45÷9)58+7×15-4
270÷(45-15)(79+21)×(96÷12)
答案

(1)195-(45+45÷9)

=195-(45+5)

=195-50

=145;

(2)58+7×15-4

=58+105-4

=163-4

=159;

(3)270÷(45-15)

=270÷30

=9;

(4)(79+21)×(96÷12)

=100×8

=800.

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