脱式计算:(124-85)×12÷26(520+480)÷50×4400-(1300÷65+35)86.7-(14.3-3.8)72.8-8.6+5.8440-(3.5-2.75+0.86)-数学

题目简介

脱式计算:(124-85)×12÷26(520+480)÷50×4400-(1300÷65+35)86.7-(14.3-3.8)72.8-8.6+5.8440-(3.5-2.75+0.86)-数学

题目详情

脱式计算:
(124-85)×12÷26(520+480)÷50×4400-(1300÷65+35)
86.7-(14.3-3.8)72.8-8.6+5.8440-(3.5-2.75+0.86)
题型:解答题难度:中档来源:不详

答案

(1)(124-85)×12÷26,
=39×12÷26,
=39÷26×12,
=39÷13×12÷2,
=3×12÷2,
=18;
(2)(520+480)÷50×4,
=1000÷50×4,
=20×4,
=80;
(3)400-(1300÷65+35),
=400-(20+35),
=400-55,
=345;
(4)86.7-(14.3-3.8),
=86.7-10.5,
=76.2;
(5)72.8-8.6+5.84,
=64.2+5.84,
=70.04;
(6)40-(3.5-2.75+0.86),
=40-(0.75+0.86),
=40-1.61,
=38.39.

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