题目内容

脱式计算.
36-27+43  
48÷6×5   42+6×4  
(26-19)×5 37-27÷3   64÷(24-16)
(23+22)÷4   80+(100-86)
分析:(1)(2)从左往右依次运算;
(3)先算乘法,再算加法;
(4)(6)(7)(8)先算括号内的,再算括号外的;
(5)先算除法,再算减法.
解答:解:(1)36-27+43,
=9+43,
=52;

(2)48÷6×5,
=8×5,
=40;

(3)42+6×4,
=42+24,
=66;

(4)(26-19)×5,
=7×5,
=35;

(5)37-27÷3,
=37-9,
=28;

(6)64÷(24-16),
=64÷8,
=8;

(7)(23+22)÷4,
=45÷4,
=11.25;

(8)80+(100-86),
=80+14,
=94.
点评:此题考查整数的四则混合运算,注意运算顺序和运算法则.
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