脱式计算(能简便的要简便). 0.233-(0.133-)+4.62+9.9+5.38+0.14×0.6+0.6÷0.38×7-+4×36×(-)+15(+)×23×19.
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解:(1)0.233-(0.133-)+,
=0.233-0.133++,
=(0.233-0.133)+(+),
=0.1+1,
=1.1;
(2)4.62+9.9+5.38+0.1,
=(4.62+5.38)+(0.1+9.9),
=10+10,
=20;
(3)4×0.6+0.6÷,
=4×0.6+0.6×4,
=0.6×(4+4),
=0.6×8,
=4.8;
(4)0.38×7-+4×,
=×7-+4×,
=×(7-4+1),
=×10,
=;
(5)36×(-)+15,
=36×-36×+15,
=16-15+15,
=16;
(6)(+)×23×19,
=×23×19+×23×19,
=23+19,
=42.
解析分析:(1)先根据减法的性质去掉括号,再根据加法结合律进行计算;
(2)根据加法交换律和加法结合律进行计算;
(3)先把除法转化为乘法,再根据乘法分配律进行计算;
(4)把0.38化成分数,再根据乘法分配律进行计算;
(5)根据乘法分配律进行计算;
(6)根据乘法分配律进行计算.
点评:本题主要考查了学生在四则运算中灵活运用简便算法的计算能力.