题目内容
计算
700-50×6= | 420÷2×3= | (74+26)×4= |
100×2+3= | 700-400+200= | 180÷(3×3)= |
分析:(1)先算乘法,再算减法;
(2)按照从左到右的顺序计算;
(3)先算小括号里面的加法,再算括号外的乘法;
(4)先算乘法,再算加法;
(5)按照从左到右的顺序计算;
(6)先算小括号里面的乘法,再算括号外的除法.
(2)按照从左到右的顺序计算;
(3)先算小括号里面的加法,再算括号外的乘法;
(4)先算乘法,再算加法;
(5)按照从左到右的顺序计算;
(6)先算小括号里面的乘法,再算括号外的除法.
解答:解:(1)700-50×6,
=700-300,
=400;
(2)420÷2×3,
=210×3,
=630;
(3)(74+26)×4,
=100×4,
=400;
(4)100×2+3,
=200+3,
=203;
(5)700-400+200,
=300+200,
=500;
(6)180÷(3×3),
=180÷9,
=20.
=700-300,
=400;
(2)420÷2×3,
=210×3,
=630;
(3)(74+26)×4,
=100×4,
=400;
(4)100×2+3,
=200+3,
=203;
(5)700-400+200,
=300+200,
=500;
(6)180÷(3×3),
=180÷9,
=20.
点评:本题考查了简单的四则混合运算,关键是理清楚运算的顺序,然后根据运算顺序逐步求解即可.
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