神机妙算细又巧
24×(++)9.56-4.875+12.5%+1.44×0.86+14%÷7?×9+.
网友回答
解:(1)24×(++),
=24×+24×+24×,
=6+3+4,
=13;
(2)9.56-4.875+12.5%+1.44,
=(9.56+1.44)-(4.875-12.5%),
=11-4.75,
=6.25;
(3)×0.86+14%÷7,
=×+0.14÷7,
=+0.02,
=;
(4)×9+,
=+,
=.
解析分析:(1)运用乘法分配律简算简算;
(2)运用加法结合律简算;
(3)同时运算乘法和除法,再算加法;
(4)先算乘法,再算加法.
点评:四则混合运算的运算顺序:
1.一个算式里,如果含有两级运算,要先做第二级运算,后做第一级运算.
2.一个算式里,如果有括号,要先算小括号里的.