题目内容
25×40-678
36+64×5
300-200÷10
8×30÷6
875+125×8.
36+64×5
300-200÷10
8×30÷6
875+125×8.
分析:(1)先算乘法,再算减法;
(2)先算乘法,再算加法;
(3)先算除法,再算减法;
(4)按照从左到右的顺序计算;
(5)先算乘法,再算加法.
(2)先算乘法,再算加法;
(3)先算除法,再算减法;
(4)按照从左到右的顺序计算;
(5)先算乘法,再算加法.
解答:解:(1)25×40-678
=1000-678
=322;
(2)36+64×5
=36+320
=356;
(3)300-200÷10
=300-20
=280;
(4)8×30÷6
=240÷6
=40;
(5)875+125×8
=875+1000
=1875.
=1000-678
=322;
(2)36+64×5
=36+320
=356;
(3)300-200÷10
=300-20
=280;
(4)8×30÷6
=240÷6
=40;
(5)875+125×8
=875+1000
=1875.
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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