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计算下面各题.(4~6题按简便算法计算.)(1)285-15+20×3;(2)285-(15+20)×3;(3)(338+565-204)÷3(4)25×6×4;(5)373+733+627;(6)6.23-1.87-2.13+3.77.

题目详情
计算下面各题.(4~6题按简便算法计算.)
(1)285-15+20×3; (2)285-(15+20)×3; (3)(338+565-204)÷3
(4)25×6×4; (5)373+733+627; (6)6.23-1.87-2.13+3.77.
▼优质解答
答案和解析
(1)285-15+20×3,
=285-15+60,
=270+60,
=330;

(2)285-(15+20)×3,
=285-35×3,
=285-105,
=180;

(3)(338+565-204)÷3,
=(903-204)÷3,
=699÷3,
=233;

(4)25×6×4,
=25×4×6,
=100×6,
=600;

(5)373+733+627,
=373+627+733,
=1000+733,
=1733;

(6)6.23-1.87-2.13+3.77,
=(6.23+3.77)-(1.87+2.13),
=10-4,
=6.