1樓:樂為人師
3/5+1/4+2/5
=(3/5+2/5)+1/4
=1+1/4
=1又1/4
11/12-(1/6-1/12)
=11/12+1/12-1/6
=1-1/6
=5/6
3/7+(5/6+4/7)
=3/7+4/7+5/6
=1+5/6
=1又5/6
9/5-(9/4+10/1)
5/9-(4/9+1/10)
=5/9-4/9-1/10
=1/9-1/10
=1/90
9/16+3/8+7/16+1/8
=(9/16+7/16)+(3/8+1/8)=1+1/2
=1又1/2
4/9+3/5+5/9+1/2
=(4/9+5/9)+(3/5+1/2)
=1+11/10
=2又1/10
用簡便方法計算下面各題6分之5+12分之1+12分之1、11分之4+5分之2+11分之7十5
2樓:心誠則靈
6分之5+12分之1+12分之1
=5/6+(1/12+1/12)
=5/6+1/6
=111分之4+5分之2+11分之7十5分之1=(4/11+7/11)+(2/5+1/5)=1+3/5
=1又3/5
8分之5+13分之5+13分之8+8分之3=(5/8+3/8)+(5/13+8/13)=1+1=2
遞等式計算題5/6-3/4+1/3 11/12-(1/6-1/8) 7/12-(3/4-1/2) 1/2-(3/4-3/8)
3樓:妙酒
您好:5/6-3/4+1/3
=10/12-9/12+4/12
=5/12
11/12-(1/6-1/8)
=22/24-4/24+3/24
=21/24
=7/8
7/12-(3/4-1/2)
=7/12-1/4
=1/3
1/2-(3/4-3/8)
=1/2-3/8
=1/8
如果本題有什麼不明白可以追問,如果滿意記得採納如果有其他問題請採納本題後另發點選向我求助,答題不易,請諒解,謝謝。
祝學習進步!
4樓:匿名使用者
5/6-3/4+1/3(通分)
=10/12-9/12+4/12
=1/12+4/12
=5/12
11/12-(1/6-1/8)
=11/12-1/6+1/8(通分)
=22/24-4/24+3/24
=18/24+3/24
=21/24(約分)
=7/8
7/12-(3/4-1/2)
=7/12-3/4+1/2(通分)
=7/12-9/12+6/12
=13/12-9/12
=4/12
=1/3
1/2-(3/4-3/8)
=1/2-3/4+3/8
=8/16-12/16+6/16
=14/16-12/16
=2/16
=1/8
5樓:匿名使用者
5/6-
3/4+1/3
=10/12-9/12+4/12
=(10-9+4)/12
=5/12
11/12-(1/6-1/8)
=11/12-2/12+1/8
=9/12+1/8
=3/4+1/8
=6/8+1/8
=7/8
7/12-(3/4-1/2)
=7/12-(3/4-2/4)
=7/12-1/4
=7/12-3/12
=4/12
=1/3
1/2-(3/4-3/8)
=1/2-(6/8-3/8)
=1/2-3/8
=4/8-3/8
=1/8
6樓:府玉蘭迮丙
1、計算題:
解:1/3÷5/6÷16/15
=1/3×6/5×15/16=3/8
[1-(1/5+1/6)]÷1/12 =[1-11/30]×12=19/30×12=38/5
(5/6-3/4)÷(1/4-1/8)=1/12÷1/8=1/12×8=2/3
應用題:
解:30÷5/6×8/9=36×8/9=32(千克)答:丙筐梨的質量是32千克.
用簡便方法計算下列各題要有過程,脫式計算
0.78 98 0.78 100 2 0.78 100 0.78 2 78 1.56 76.44 3.6 1.9 0.36 81 3.6 1.9 3.6 8.1 3.6 1.9 8.1 3.6 10 367.6 2.4 6.5 7.6 7.6 0.76 7.6 2.4 7.6 6.5 7.6 1 7...
用簡便方法計算下面各題(1)2(2)99 48 48(3)2019 125 8(4)77 2 14
1 1500 28 272,1500 28 272 1500 300,1200 2 99 48 48,99 1 48,100 48,4800 3 2000 125 8,2000 125 8 2000 1000,2 4 77 2.14 23 7.86,77 23 2.14 7.86 100 10,11...
用簡便方法計算下面各題 (1)9898 203(2)1308 (308 1493)(4256 125 825)
解答 1 9898 203 9898 102 101 1000 101 10101 2 1308 308 149 1308 308 149 1000 149 1149 3 4256 125 825 256 4256 256 125 825 4000 950 4950 分析 加減法簡便運算的基本思路是...