1樓:匿名使用者
5/7+5/9×
dao3/2+1/6
= 5/7+5/6+1/6
= 7/5+1
= 1+2/5+1
= 2又版2/5
4/9×權5/7+2/7÷9/4
= 4/9×5/7+2/7×4/9
= 4/9×(5/7+2/7)
= 4/9 × 1
= 4/9
4/9×5/11+5/9×7/11
= 4/9×5/11+ 7/9×5/11
= 5/11×(4/9+7/9)
= 5/11 × 11/9
= 5/9
1/9×9/10-1/9×3/10+4/9×1/10= 1/9×9/10-1/9×3/10+1/9×4/10= 1/9×(9/10-3/10+4/10)= 1/9×10/10
= 1/9
怎樣簡便就怎樣算?5/7+5/9×3/2+1/6。
2樓:匿名使用者
5/7+5/9×3/2+1/6
= 5/7+5/6+1/6
= 7/5+1
=1+2/5+1
=2又2/5
3樓:歡歡喜喜
(5/7)+(5/9)x(3/2)+(1/6)=(5/7)+(5/6)+(1/6)
=(5/7)+[(5/6)+(1/6)]
=(5/7)+1
=1又7分之5.
4樓:0o壹次心
5/7+5/9x3/2+1/6
=5/7+5/6+1/6
=5/7+1
=1又5/7
5樓:匿名使用者
5/7+5/9×3/2+1/6
=5/7+5/6+1/6
=5/7+1
=12/7
怎樣簡便怎樣算5/6-2/5+7/9-3/5?
6樓:半島七星
這是分數加減
,可以計算如下
原式=5/6+7/9-(2/5+3/5)加法交換律=15/18+14/18-1
=(15+14)/18-18/18
=(29-18)/18
=11/18
7樓:鍵盤上的筆
5/6-2/5+7/9-3/5
=5/6+7/9-(2/5+3/5)
=5/6+7/9-1
=45/54+42/54-1
=87/54-54/54
=33/54
願對你有幫助
8樓:匿名使用者
原式=15/18+14/18-(2/5+3/5)
=29/18-1
=11/18。
下面各題怎樣算簡便就怎樣算4/7+1/6-4/7 2-7/9-2/9 3/5+7/8+2/5 7/9-{1/9+1/3}1/4+{2/5+3/4} 5/6-3/10+1/6-
9樓:乘方的乘方
解:du
zhi4/7+1/6-4/7
=4/7-4/7+1/6
=1/6
2-7/9-2/9
= 2-(
dao7/9+2/9)
回=2-1
=13/5+7/8+2/5
= 3/5+2/5+7/8
=1+7/8
=1又答7/8
7/9-
=7/9-1/9-1/3
=6/9-1/3
=2/3-1/3
=1/3
1/4+
=1/4+3/4+2/5
=1+2/5
=1又2/5
5/6-3/10+1/6
=5/6+1/6-3/10
=1-3/10
=7/10
脫式計算,能簡算就簡算,怎麼算? 1/6+1/5+1/2= 2-4/7+2/9-3/7= 7/8-
10樓:南宮傾城
1/6+1/5+1/2
=5/30+6/30+15/30
=11/30+15/30
=13/15
怎樣簡便就怎樣算 4/9+4/7+5/9+3/7 25×3/11×4×11/25
11樓:匿名使用者
1,bai
4/9+4/7+5/9+3/7=(
du4/9+5/9)+(4/7+3/7)=1+1=22,25×
zhi3/11×4×11/25(1/14+2/7-dao1/4)×回28=(28/14+28×2/7-28/4)×(25×3×4×11)/(11×25)
=(2+8-7)×(答3×4)
=3×12
=363,
(4/7+1/2)×7/25+2/5
=4/7×7/25+1/2×7/25+2/5=4/25+7/50+2/5
=8/50+7/50+20/50
=35/50
=7/10
用簡便方法計算各題分數的題1/5+5/6+4/5 7/9-1/7-2/4 2/1...
12樓:艾騰汗博濤
用簡便方法計算各題分數的題
1/5+5/6+4/5
=(版1/5+4/5)權+5/6=1+5/6=1又5/67/9-1/7-2/9
=(7/9-2/9)-1/7=5/9-1/7=25/632/15+4/21+7/15+2/21
=(2/15+7/15)+(4/21+2/21)=3/5+2/7=31/352/3-1/2+2/3-1/2
=(2/3+2/3)-(1/2+1/2)=4/3-1=1/35/12+(1/12-2/5)=(5/12+1/12)-2/5=1/2-2/5=1/102/15+(2/5-1/15)-1/5=(2/15-1/15)+(2/5-1/5)=1/15+1/5=4/15
怎樣簡便就怎樣算47,怎樣簡便就怎樣算
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