用递等式计算.
25×24+125????23×34-58320+26×271500-125×8.
网友回答
解:25×24+125
=600+125,
=725;
23×34-58
=782-58,
=724;
320+26×27
=320+702,
=1022;
1500-125×8
=1500-1000,
=500.
解析分析:25×24+125,先计算乘法,再计算加法;23×34-58,先计算乘法,再计算减法;320+26×27,先计算乘法,再计算加法;1500-125×8,先计算乘法,再计算减法.
点评:整数四则混合运算要根据它们的运算顺序进行计算.