简便计算 99*2.5+2.5 6.4*4.5+3.6*4.5 6.25/0.25+0.75 99*2.5+2.5 42
来源:学生作业帮 编辑:搜搜做题作业网作业帮 分类:数学作业 时间:2024/07/10 21:36:18
简便计算 99*2.5+2.5 6.4*4.5+3.6*4.5 6.25/0.25+0.75 99*2.5+2.5 42.5+24.4/16 0.8*(13-2.53/18)
![简便计算 99*2.5+2.5 6.4*4.5+3.6*4.5 6.25/0.25+0.75 99*2.5+2.5 42](/uploads/image/z/1286215-7-5.jpg?t=%E7%AE%80%E4%BE%BF%E8%AE%A1%E7%AE%97+99%2A2.5%2B2.5+6.4%2A4.5%2B3.6%2A4.5+6.25%2F0.25%2B0.75+99%2A2.5%2B2.5+42)
.87×0.25+0.087×7.5
=0.87×0.25+0.87×0.75
=0.87×(0.25+0.7)
=0.87
=0.87×0.25+0.87×0.75
=0.87×(0.25+0.7)
=0.87