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脱式计算,能简便的写简便过程.6.3+6.44+2.7+3.56600÷1215.35-(5.35+7.2)267×102(58+420÷6)×12(450-125)×(82-64)72.8-8.66+5.34(200+350)÷11×38720-(750÷15+248)11.8+391÷17+25.

题目详情

脱式计算,能简便的写简便过程.
6.3+6.44+2.7+3.56
600÷12
15.35-(5.35+7.2)267×102
(58+420÷6)×12
(450-125)×(82-64)
72.8-8.66+5.34
(200+350)÷11×38
720-(750÷15+248)
11.8+391÷17+25.
▼优质解答
答案和解析
(1)6.3+6.44+2.7+3.56,
=(6.3+2.7)+(6.44+3.56),
=9+10,
=19;

(2)600÷12,
=600÷6÷2,
=100÷2,
=50;

(4)(58+420÷6)×12,
=(58+70)×12,
=128×12,
=1536;

(5)(450-125)×(82-64),
=325×18,
=5850;

(6)72.8-8.66+5.34,
=64.14+5.34,
=69.48;

(7)(200+350)÷11×38,
=550÷11×38,
=50×38,
=1900;

(8)720-(750÷15+248),
=720-(50+248),
=720-298,
=422;

(9)11.8+391÷17+25,
=11.8+23+25,
=34.8+25,
=59.8.