题目内容

脱式计算.
7.5÷(8.43-8.18)×0.26
23.17+3.5×0.6
300-(0.48+0.24)÷0.9
32.76+6.3-3.6×0.15.
分析:(1)先算括号内的,然后从左往右依次运算;
(2)先算乘法,再算加法;
(3)先算括号内的,再算除法,最后算减法;
(4)先算乘法,然后从左往右依次运算.
解答:解:(1)7.5÷(8.43-8.18)×0.26
=7.5÷0.25×0.26
=30×0.26
=7.8;

(2)23.17+3.5×0.6
=23.17+2.1
=25.27;

(3)300-(0.48+0.24)÷0.9
=300-0.72÷0.9
=300-0.8
=299.2;

(4)32.76+6.3-3.6×0.15
=32.76+6.3-0.54
=39.06-0.54
=38.52.
点评:此题考查了小数的四则混合运算,注意运算顺序和运算法则.
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