能简算的要简算(脱式计算)
53×47-280÷35 29×27-27×9
25×27×40 (132+18)÷(40-15)
522÷【(301-299)×29】 202+135+198
人气:466 ℃ 时间:2020-03-21 23:31:42
解答
53×47-280÷35
=(50+3)(50-3)-8
=2500-9-8
=2483
29×27-27×9
=(29-9)×27
=20×27
=540
25×27×40
=25×4×27×10
=100×270
=27000
(132+18)÷(40-15)
=150÷25
=6
522÷【(301-299)×29】
=522÷(2×29)
=522÷2÷29
=9
202+135+198
=(202+198)+135
=400+135
=535
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