计算下面各题(能简算的要简算) 23.4-8.54-1.4615.25-3.1+0.75-4.926×101-2673+3.4+27+5.6363×7+237×7101×39.
网友回答
解:(1)23.4-8.54-1.46,
=23.4-(8.54+1.46),
=23.4-10,
=13.4;
(2)15.25-3.1+0.75-4.9,
=(15.25+0.75)-(3.1+4.9),
=16-8,
=8;
(3)26×101-26,
=26×(101-1),
=26×100,
=2600;
(4)73+3.4+27+5.6,
=(73+27)+(3.4+5.6),
=100+9,
=109;
(5)363×7+237×7,
=7×(363+237),
=7×600,
=4200;
(6)101×39,
=(100+1)×39,
=100×39+39,
=3939.
解析分析:(1)运用减法的性质简算;(2)运用加法交换律与结合率以及减法的性质简算;(3)(5)运用乘法分配律简算;(4)运用加法交换律与结合律简算;(6)把101看作100+1,运用乘法分配律简算.
点评:完成本题要注意分析式中数据,运用合适的简便方法计算.