题目内容
脱式计算: 240÷4÷2 |
819-3×8 |
560-360÷6 | 520+255-75 |
分析:(1)按照从左到右的顺序计算;
(2)先算乘法,再算减法;
(3)先算除法,再算减法;
(4)按照从左到右的顺序计算.
(2)先算乘法,再算减法;
(3)先算除法,再算减法;
(4)按照从左到右的顺序计算.
解答:解:(1)240÷4÷2
=60÷2
=30;
(2)819-3×8
=819-24
=795;
(3)560-360÷6
=560-60
=500;
(4)520+255-75
=775-75
=700.
=60÷2
=30;
(2)819-3×8
=819-24
=795;
(3)560-360÷6
=560-60
=500;
(4)520+255-75
=775-75
=700.
点评:本题考查了简单的四则混合运算,计算时先理清楚运算顺序,根据运算顺序逐步求解即可.
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