题目内容

计算下列各题.

38.83÷4.4-7.85  
16.8+14.7÷0.7 2.48+4.832÷1.6  
0.64÷1.6÷0.5 3.2×6.5÷0.26   2.61÷1.8×0.4.
分析:(1)先算除法,再算减法;
(2)先算除法,再算加法;
(3)先算除法,再算加法;
(4)按照从左向右的顺序进行计算;
(5)按照从左向右的顺序进行计算;
(6)按照从左向右的顺序进行计算.
解答:解:
(1)38.83÷4.4-7.85,
=8.825-7.85,
=0.975;

(2)16.8+14.7÷0.7,
=16.8+21,
=37.8;

(3)2.48+4.832÷1.6,
=2.48+3.02,
=5.5;

(4)0.64÷1.6÷0.5,
=0.4÷0.5,
=0.8;

(5)3.2×6.5÷0.26,
=20.8÷0.26,
=80;

(6)2.61÷1.8×0.4,
=1.45×0.4,
=0.58.
点评:此题主要考查小数的四则混合运算的运算顺序,然后根据运算顺序进行计算.
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