作业帮简便计算：85.5*2345-85.4*1345
来源：学生作业帮助网 编辑：作业帮 时间：2024/04/29 13:44:19
简便计算：85.5*2345-85.4*1345
简便计算：85.5*2345-85.4*1345
简便计算：85.5*2345-85.4*1345
85.5*2345-85.4*1345
=85.4*2345-85.4*1345+0.1 *2345
=85.4*(2345-1345)+0.1 *2345
=85.4*1000+234.5
=85400+234.5
=85634.5
原式=（85.4+0.1）*（1345+1000）-85.4*1345
=85.4*1345+0.1*1345+85.4*1000+0.1*1000-85.4*1000
=134.5+85400+100
=85634.5
=85.5 * 2345 - (85.5 -0.1) * 1345
= 85.5 * (2345-1345) + 0.1 * 1345
= 85.5 * 1000 + 134.5
= 85500 + 134.5
= 85634.5