脱式计算.(友情提醒:有的可以简算) 800-608÷32×53.68-3.6×0.2+0.1848×9.9+48×0.1(1-)÷0.25×4(6-6×)÷12.
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解:(1)800-608÷32×5,
=800-19×5,
=800-95,
=705;
(2)3.68-3.6×0.2+0.18,
=3.68-0.72+0.18,
=2.96+0.18,
=3.14;
(3)48×9.9+48×0.1,
=48×(9.9+0.1),
=48×10,
=480;
(4)(1-)÷0.25×4,
=0.25÷0.25×4,
=1×4,
=4;
(5)(6-6×)÷12,
=(6-4)÷12,
=2÷12,
=.
解析分析:(1)先算除法,再算乘法,最后算减法;
(2)先算乘法,再算减法,最后算加法;
(3)运用乘法分配律简算;
(4)先算小括号里面的减法,再算括号外的除法,最后算乘法;
(5)先算小括号里面的乘法,再算小括号里面的减法,最后算括号外的除法.
点评:此题主要考查分数、整数、小数的四则混合运算的运算顺序和应用运算定律进行简便计算.