用简便的方法计算下面各题
来源:学生作业帮 编辑:百度作业网作业帮 分类:数学作业 时间:2024/07/11 20:56:09
用简便的方法计算下面各题
15-5÷12-7/12
2-1/4-1/3-3/4
5/8-(5/8-1/2)
1/5×37%+4/5×37%
1/6÷11/24-3/8×4//11
68-7.5+32-2.5
15-5÷12-7/12
2-1/4-1/3-3/4
5/8-(5/8-1/2)
1/5×37%+4/5×37%
1/6÷11/24-3/8×4//11
68-7.5+32-2.5
![用简便的方法计算下面各题](/uploads/image/z/4817233-1-3.jpg?t=%E7%94%A8%E7%AE%80%E4%BE%BF%E7%9A%84%E6%96%B9%E6%B3%95%E8%AE%A1%E7%AE%97%E4%B8%8B%E9%9D%A2%E5%90%84%E9%A2%98)
15-5÷12-7/12
=15-5/12-7/12
=15-(5/12+7/12)
=15-1
=14
2-1/4-1/3-3/4
=2-1/4-3/4-1/3
=2-(1/4+3/4)-1/3
=2-1-1/3
=1-1/3
=2/3
5/8-(5/8-1/2)
=5/8-5/8+1/2
=1/2
1/5×37%+4/5×37%
=(1/5+4/5)×37%
=37%
1/6÷11/24-3/8×4/11
=1/6*24/11-3/8×4/11
=4/11-3/8×4/11
=4/11(1-3/8)
=4/11*5/8
=5/22
68-7.5+32-2.5
=68+32-7.5-2.5
=100-(7.5+2.5)
=100-10
=90
=15-5/12-7/12
=15-(5/12+7/12)
=15-1
=14
2-1/4-1/3-3/4
=2-1/4-3/4-1/3
=2-(1/4+3/4)-1/3
=2-1-1/3
=1-1/3
=2/3
5/8-(5/8-1/2)
=5/8-5/8+1/2
=1/2
1/5×37%+4/5×37%
=(1/5+4/5)×37%
=37%
1/6÷11/24-3/8×4/11
=1/6*24/11-3/8×4/11
=4/11-3/8×4/11
=4/11(1-3/8)
=4/11*5/8
=5/22
68-7.5+32-2.5
=68+32-7.5-2.5
=100-(7.5+2.5)
=100-10
=90