问题 解答题

脱式计算:

75×12+280÷35

26+14×(70-30)

[175-(49+26)]×20.

答案

(1)75×12+280÷35

=900+8

=908

(2)26+14×(70-30)

=26+14×40

=26+560

=586

(3)[175-(49+26)]×20

=[175-75]×20

=100×20

=2000

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