用简便方法计算46×7/45 2/3×5/4除以10/9 24×2/7×5/72×21 8/13除以7+1/7×6/13

来源:学生作业帮助网 编辑:作业帮 时间:2024/05/05 06:46:57
用简便方法计算46×7/45 2/3×5/4除以10/9 24×2/7×5/72×21 8/13除以7+1/7×6/13

用简便方法计算46×7/45 2/3×5/4除以10/9 24×2/7×5/72×21 8/13除以7+1/7×6/13
用简便方法计算46×7/45 2/3×5/4除以10/9 24×2/7×5/72×21 8/13除以7+1/7×6/13

用简便方法计算46×7/45 2/3×5/4除以10/9 24×2/7×5/72×21 8/13除以7+1/7×6/13
46×7/45
=(45+1)*7/45
=7+7/45
=7又45分之7
2/3×5/4除以10/9
=10/12*9/10
=3/4
24×2/7×5/72×21
=24*5/72*2/7*21
=5/3*6/7
=10/7
8/13除以7+1/7×6/13
=8/13*1/7+1/7*6/13
=2/13*7(4+3)
=2/13