用你喜欢的方法计算下面各题.
363×7+237×7
4300÷25÷4
25×7×44
3.27+6.4+2.73+4.6
12×(324-285)÷26.
网友回答
解:(1)363×7+237×7,
=(363+237)×7,
=600×7,
=4200;
(2)4300÷25÷4,
=4300÷(25×4),
=4300÷100,
=43;
(3)25×7×44,
=25×7×4×11,
=(25×4)×(7×11),
=100×77,
=7700;
(4)3.27+6.4+2.73+4.6,
=(3.27+2.73)+(6.4+4.6),
=6+11,
=17;
(5)12×(324-285)÷26,
=12×39÷26,
=468÷26,
=18.
解析分析:(1)运用乘法分配律简算;
(2)根据除法的性质简算;
(3)先把44分解成4×11,再运用乘法结合律简算;
(4)运用加法交换了和结合律简算;
(5)先算小括号里面的减法,再算括号外的乘法,最后算除法.
点评:此题是考查四则混合运算,要仔细观察算式的特点,灵活运用一些定律进行简便计算.