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神机妙算.42÷7×24(125+185)×647+25×31800-28×735×4+680420×2+140.

题目详情
神机妙算.
42÷7×24     (125+185)×6    47+25×3
1800-28×7    35×4+680        420×2+140.
▼优质解答
答案和解析
(1)42÷7×24
=6×24
=144;

(2)(125+185)×6
=310×6
=1860;

(3)47+25×3
=47+75
=122;

(4)1800-28×7
=1800-196
=1604;

(5)35×4+680
=140+680
=820;

(6)420×2+140
=840+140
=980.