问题
解答题
脱式计算
(1)200×3+800
(2)60×4-80
(3)75+20×4.
答案
(1)200×3+800
=600+800
=1400;
(2)60×4-80
=240-80
=160;
(3)75+20×4
=75+80
=155.
脱式计算
(1)200×3+800
(2)60×4-80
(3)75+20×4.
(1)200×3+800
=600+800
=1400;
(2)60×4-80
=240-80
=160;
(3)75+20×4
=75+80
=155.