问题 解答题
递等式计算.
(1)18×5×20;(2)1200-8×25;(3)(62+16)×27;
(4)20×26-80;(5)38+15×30;(6)125×7×8.
答案

(1)18×5×20

=18×(5×20)

=18×100

=1800

(2)1200-8×25

=1200-200

=1000

(3)(62+16)×27

=78×27

=2106

(4)20×26-80

=520-80

=440

(5)38+15×30

=38+450

=488

(6)125×7×8

=125×8×7

=1000×7

=7000

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