题目内容

脱式计算
6.4×2.4+3.6        
3.053-0.1×5.3      
213.6÷0.8÷0.03 135.96-9.1×5.6      
15.6÷1.3×0.37        32.84×2.6+3.46.
分析:(1)(6)先算乘法,整数加法;
(2)(4)先算乘法,整数减法;
(3)(5)从左往右依次计算.
解答:解:(1)6.4×2.4+3.6
=15.36+3.6
=18.96;

(2)3.053-0.1×5.3  
=3.053-0.53
=2.523;

(3)213.6÷0.8÷0.03
=267÷0.03
=8900;

(4)135.96-9.1×5.6
=135.96-50.96
=85;

(5)15.6÷1.3×0.37
=12×0.37
=4.44;

(6)32.84×2.6+3.46
=85.384+3.46
=88.844.
点评:考查了小数的四则混合运算.注意运算顺序和运算法则,灵活运用所学的运算律简便计算.
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