计算下列各题(能简便计算的要简便计算)21又7/8-(1.875+1又7/10) 7又3/7+(3又1/5-2又3/7)-2又1/52又2/3+0.8-(1.8-5/6) 1.625+4又6/7+(4又3/8-3又6/7)再来一个方程。x-(2又1/20+5.75)=8/15
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/28 11:56:20
![计算下列各题(能简便计算的要简便计算)21又7/8-(1.875+1又7/10) 7又3/7+(3又1/5-2又3/7)-2又1/52又2/3+0.8-(1.8-5/6) 1.625+4又6/7+(4又3/8-3又6/7)再来一个方程。x-(2又1/20+5.75)=8/15](/uploads/image/z/1067130-18-0.jpg?t=%E8%AE%A1%E7%AE%97%E4%B8%8B%E5%88%97%E5%90%84%E9%A2%98%EF%BC%88%E8%83%BD%E7%AE%80%E4%BE%BF%E8%AE%A1%E7%AE%97%E7%9A%84%E8%A6%81%E7%AE%80%E4%BE%BF%E8%AE%A1%E7%AE%97%EF%BC%8921%E5%8F%887%2F8-%281.875%2B1%E5%8F%887%2F10%29+7%E5%8F%883%2F7%2B%EF%BC%883%E5%8F%881%2F5-2%E5%8F%883%2F7%29-2%E5%8F%881%2F52%E5%8F%882%2F3%2B0.8-%EF%BC%881.8-5%2F6%EF%BC%89+1.625%2B4%E5%8F%886%2F7%2B%284%E5%8F%883%2F8-3%E5%8F%886%2F7%EF%BC%89%E5%86%8D%E6%9D%A5%E4%B8%80%E4%B8%AA%E6%96%B9%E7%A8%8B%E3%80%82x-%EF%BC%882%E5%8F%881%2F20%2B5.75%EF%BC%89%3D8%2F15)
计算下列各题(能简便计算的要简便计算)21又7/8-(1.875+1又7/10) 7又3/7+(3又1/5-2又3/7)-2又1/52又2/3+0.8-(1.8-5/6) 1.625+4又6/7+(4又3/8-3又6/7)再来一个方程。x-(2又1/20+5.75)=8/15
计算下列各题(能简便计算的要简便计算)
21又7/8-(1.875+1又7/10) 7又3/7+(3又1/5-2又3/7)-2又1/5
2又2/3+0.8-(1.8-5/6) 1.625+4又6/7+(4又3/8-3又6/7)
再来一个方程。
x-(2又1/20+5.75)=8/15
计算下列各题(能简便计算的要简便计算)21又7/8-(1.875+1又7/10) 7又3/7+(3又1/5-2又3/7)-2又1/52又2/3+0.8-(1.8-5/6) 1.625+4又6/7+(4又3/8-3又6/7)再来一个方程。x-(2又1/20+5.75)=8/15
1)原式=175/8 - (15/8 +17/10) + 16/5 -17/7 - 11/5
=175/8 - 15/8 -17/10 + 16/5 -17/7 - 11/5
=175/8 - 15/8 + 16/5 -11/5 -17/10 - 17/7
=20+1-17/10-17/7
=193/10-17/7
=1181/70
2)原式=8/3+0.8-1.8-5/6
=8/3-5/6-1
=6/16-5/6-1
=11/6-1
=5/6
3)原式=13/8+34/7+35/8-27/7
=13/8+35/8+34/7-27/7
=48/8+1
=56/8=7
4)化简后:x-41/20-115/20=8/15
x-156/20=8/15
x=156/20+8/15
x=39/5+8/15
x=117/15+8/15
x=25/3