9*(1-2/5÷9/20﹚÷3/20-1又3/7
来源:学生作业帮 编辑:大师作文网作业帮 分类:数学作业 时间:2024/09/22 09:37:43
9*(1-2/5÷9/20﹚÷3/20-1又3/7
1/5÷[﹙2/3+20%﹚*1/13]
8*3又1/7÷[1÷﹙3又1/5﹣2.95﹚]
1/5÷[﹙2/3+20%﹚*1/13]
8*3又1/7÷[1÷﹙3又1/5﹣2.95﹚]
9*(1-2/5÷9/20﹚÷3/20-1又3/7
=9*(1- 2/5 × 20/9)×(20/3) - 1又3/7
=9*(1- 8/9)×(20/3) - 1又3/7
=9*(1/9)×(20/3) - 1又3/7
=20/3 - 1又3/7
=7 - 1/3 - 1 - 3/7
=6 - 7/21 - 9/21
=6 - 16/21
=5又5/21
.
1/5÷[﹙2/3+20%﹚*1/13]
=1/5÷[(2/3 + 1/5)*1/13]
=1/5÷[(10/15 + 3/5)*1/13]
=1/5÷[(13/15)*(1/13)]
=1/5÷(1/15)
=1/5 ×15
=3
.
8*3又1/7÷[1÷﹙3又1/5﹣2.95﹚]
=8*3又1/7÷[1÷(3.2 - 3 +0.05)]
=8*3又1/7÷(1÷0.25)
=8*3又1/7 ÷4
=2*(3+ 1/7)
=6 + 2/7
=6又2/7
=9*(1- 2/5 × 20/9)×(20/3) - 1又3/7
=9*(1- 8/9)×(20/3) - 1又3/7
=9*(1/9)×(20/3) - 1又3/7
=20/3 - 1又3/7
=7 - 1/3 - 1 - 3/7
=6 - 7/21 - 9/21
=6 - 16/21
=5又5/21
.
1/5÷[﹙2/3+20%﹚*1/13]
=1/5÷[(2/3 + 1/5)*1/13]
=1/5÷[(10/15 + 3/5)*1/13]
=1/5÷[(13/15)*(1/13)]
=1/5÷(1/15)
=1/5 ×15
=3
.
8*3又1/7÷[1÷﹙3又1/5﹣2.95﹚]
=8*3又1/7÷[1÷(3.2 - 3 +0.05)]
=8*3又1/7÷(1÷0.25)
=8*3又1/7 ÷4
=2*(3+ 1/7)
=6 + 2/7
=6又2/7
1又2\1-2又6\5+3又12\1-4又20\19+5又30\1-6又42\41+7又56\1-8又72\71+9又9
1又1/2+2又1/6+3又1/12+4又1/20+5又1/30+6又1/42+7又1/56+8又1/72+9又1/90
1+2又1/6+3又1/13+4又1/20+5又1/30+6又1/42+7又1/56+8又1/72+9又1/90+10又
1又1/2-2又5/6+3又1/12-4又19/20+5又1/30-6又41/42+7又1/56-8又71/72+9又1
1+2又6分之1+3又12分之1+4又20分之1+5又30分之1+6又42分之1+7又56分之1+8又78分之1+9又9
1+2又6分之1+3又12分之1+4又20分之1+5又30分之1+6又42分之1+7又56分之1+8又72分之1+9又9
1+2又1/8+3又1/12+4又1/20+5又1/30-6又1/42+7又1/56+8又1/42+9又1/42
1+2又1/6+3又1/12+4又1/20+5又1/30+6又1/42+7又1/56+8又1/72+9又1/90
1+2又1/6+3又1/12+4又1/20+5又1/30+6又1/42+7又1/56+8又1/72+9又1/90=
1 又1/2-2又5/6+3又1/12-4又19/20-5又1/30+6又41/42-7又1/56+8又71/72-9
1+2又6分之一+3又12分之一+4又20分之一+5又30分之一+6又42分之一+7又56分之一+8又75分之一+9又9
【1又1/10+2又7/20÷(3又1/12-1.125)】×9/23-1/6 简便运算