脱式计算: (124-85)×12÷26 (520+480)÷50×4 400-(1300÷65+35) 86.7-(14.3-3.8) 72.8-8.6
答案:1 悬赏:50 手机版
解决时间 2021-11-11 05:18
- 提问者网友:浩歌待明月
- 2021-11-11 02:04
脱式计算: (124-85)×12÷26 (520+480)÷50×4 400-(1300÷65+35) 86.7-(14.3-3.8) 72.8-8.6
最佳答案
- 五星知识达人网友:低血压的长颈鹿
- 2021-11-11 02:25
(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.
=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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