1+1/3-7/12+9/20-11/30+13/42-15/56 人教六年级简便计算 明天老师改对我在给你分哈
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/04 03:38:36
![1+1/3-7/12+9/20-11/30+13/42-15/56 人教六年级简便计算 明天老师改对我在给你分哈](/uploads/image/z/33023-47-3.jpg?t=1%2B1%2F3-7%2F12%2B9%2F20-11%2F30%2B13%2F42-15%2F56+%E4%BA%BA%E6%95%99%E5%85%AD%E5%B9%B4%E7%BA%A7%E7%AE%80%E4%BE%BF%E8%AE%A1%E7%AE%97+%E6%98%8E%E5%A4%A9%E8%80%81%E5%B8%88%E6%94%B9%E5%AF%B9%E6%88%91%E5%9C%A8%E7%BB%99%E4%BD%A0%E5%88%86%E5%93%88)
1+1/3-7/12+9/20-11/30+13/42-15/56 人教六年级简便计算 明天老师改对我在给你分哈
1+1/3-7/12+9/20-11/30+13/42-15/56 人教六年级简便计算
明天老师改对我在给你分哈
1+1/3-7/12+9/20-11/30+13/42-15/56 人教六年级简便计算 明天老师改对我在给你分哈
1+1/3-7/12+9/20-11/30+13/42-15/56
=4/3-(4/3-3/4)+(5/4-4/5)-(6/5-5/6)+(7/6-6/7)-(8/7-7/8)
=4/3-4/3+3/4+5/4-4/5-6/5+5/6+7/6-6/7-8/7+7/8
=4/3-4/3+(3/4+5/4)-(4/5+6/5)+(5/6+7/6)-(6/7+8/7)+7/8
=0+2-2+2-2+7/8
=7/8
1+1/3-7/12+9/20-11/30+13/42-15/56
=1+1/3-(1/3+1/4)+(1/4+1/5)-(1/5+1/6)+(1/6+1/7)-(1/7+1/8)
=1+1/3-1/3-1/4+1/4+1/5-1/5-1/6+1/6+1/7-1/7-1/8
=1-1/8
=7/8
1+1/3-7/12+9/20-11/30+13/42-15/56
=1+1/3-(3+4)/12+(4+5)/20-(5+6)/30+(6+7)/42-(7+8)/56
=1+1/3-1/3-1/4+1/4+1/5-1/5-1/6+1/6+1/7-1/7-1/8
=1-1/8=7/8
自己打的
1+1/3-7/12+9/20-11/30+13/42-15/56
=(1+1/3-7/12-1/4)+(9/20-11/30)+7/42+6/42-1/56
=(16/12-7/12-3/12)+(27/60-22/60)+1/6+(1/7-1/7+1/8)
=1/2+1/12+1/6+1/8
=12/24+2/24+4/24+3/24
=21/24=7/8