用简便方法计算下列各题
4.6*8+4又3/5*2=?13又2/13-2.25-7又3/4=?14又5/8-2又7/11-1又4/11=?999*1999+999=?(5/6+7/8-5/12)...
4.6*8+4又3/5*2=? 13又2/13-2.25-7又3/4=? 14又5/8-2又7/11-1又4/11=?
999*1999+999=? (5/6+7/8-5/12)/1/24=? 9又9/16/9=?
3又3/4*8-3又3/4+3*3.75=? (90+1/88)*1/89=? 2.25*7又1/5+28/4分之9=?
7/18/5+1/18*1/5=? 2.5*3/7*0.4*2又1/3=? 13又4/11-(2又2/3-7/11)=?
0.91/5分之4+1.25*1.09=? 48*(5/6+5/8-5/12-7/16)=?
8又1/4-3又2/7-1又5/7+1.75=? (1/3-1/4)+(1/4-1/5)+(1/5-1/6)=?
7*13*(8/7-14/13)=?
请用脱式方法计算,要写具体,详细。
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999*1999+999=? (5/6+7/8-5/12)/1/24=? 9又9/16/9=?
3又3/4*8-3又3/4+3*3.75=? (90+1/88)*1/89=? 2.25*7又1/5+28/4分之9=?
7/18/5+1/18*1/5=? 2.5*3/7*0.4*2又1/3=? 13又4/11-(2又2/3-7/11)=?
0.91/5分之4+1.25*1.09=? 48*(5/6+5/8-5/12-7/16)=?
8又1/4-3又2/7-1又5/7+1.75=? (1/3-1/4)+(1/4-1/5)+(1/5-1/6)=?
7*13*(8/7-14/13)=?
请用脱式方法计算,要写具体,详细。
帮帮忙吧
知道多少就回答多少,不需要全部写完,如果你能全部写完就最好 展开
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4.6*8+4又3/5*2=4*8+4/5*8+4+3/5*2=32+4+38/5=43右3/5
类似的算法,先统一分母,然后合并
类似的算法,先统一分母,然后合并
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4.6*8+4又3/5*2
=4.6×(8+2)
=46
13又2/13-2.25-7又3/4
= 13又2/13-(2.25+7又3/4)
= 13又2/13-10
= 3又2/13
14又5/8-2又7/11-1又4/11
= 14又5/8-(2又7/11+1又4/11)
=14又5/8-4
=1又5/8
999*1999+999
= 999×(1999+1)
=1998000
(5/6+7/8-5/12)/1/24
=(5/6)÷(1/24)+(7/8)÷(1/24)-(5/12)÷(1/24)
=20+21-10
=31
9又9/16/9
=9÷9+(9/16)÷9
=1+81/16
=6又1/16
3又3/4*8-3又3/4+3*3.75
= 3.75×(8-1+3)
=3.75×10
=37.5
(90+1/88)*1/89
= (89+89/88)*1/89
=89×1/89+89/88×1/89
=1+1/88
=1又1/188
2.25*7又1/5+28/4分之9
= 2.25÷(9/4)×[(36/5)+28]
= 1×(35又1/5)
=35又1/5
7/18*1/5+1/18*1/5
=1/5×(7/18+1/18)
=15×1
=15
2.5*3/7*0.4*2又1/3
=(2.5×0.4)×(2又1/3×3/7 )
=1×1
=1
13又4/11-(2又2/3-7/11)
= 13又4/11+7/11-2又2/3
=14-2又2/3
=11又1/3
0.91/5分之4+1.25*1.09
= 0.91×(4/5)+1.25*1.09
=1.25×(0.91+1.09)
=1.25×2
=2.5
48*(5/6+5/8-5/12-7/16)
= 5/6×48+5/8×48-5/12×48-7/16×48
=40+30+20+21
=111
8又1/4-3又2/7-1又5/7+1.75
= (8又1/4+1.75)-(3又2/7+1又5/7)
=10-5
=5
(1/3-1/4)+(1/4-1/5)+(1/5-1/6)
= (-1/4+1/4)-(1/5-1/5)+(1/3-1/6)
=1/6
7*13*(8/7-14/13)
=7×13×(8/7)-14/13×7×13×
=104-98
=6
=4.6×(8+2)
=46
13又2/13-2.25-7又3/4
= 13又2/13-(2.25+7又3/4)
= 13又2/13-10
= 3又2/13
14又5/8-2又7/11-1又4/11
= 14又5/8-(2又7/11+1又4/11)
=14又5/8-4
=1又5/8
999*1999+999
= 999×(1999+1)
=1998000
(5/6+7/8-5/12)/1/24
=(5/6)÷(1/24)+(7/8)÷(1/24)-(5/12)÷(1/24)
=20+21-10
=31
9又9/16/9
=9÷9+(9/16)÷9
=1+81/16
=6又1/16
3又3/4*8-3又3/4+3*3.75
= 3.75×(8-1+3)
=3.75×10
=37.5
(90+1/88)*1/89
= (89+89/88)*1/89
=89×1/89+89/88×1/89
=1+1/88
=1又1/188
2.25*7又1/5+28/4分之9
= 2.25÷(9/4)×[(36/5)+28]
= 1×(35又1/5)
=35又1/5
7/18*1/5+1/18*1/5
=1/5×(7/18+1/18)
=15×1
=15
2.5*3/7*0.4*2又1/3
=(2.5×0.4)×(2又1/3×3/7 )
=1×1
=1
13又4/11-(2又2/3-7/11)
= 13又4/11+7/11-2又2/3
=14-2又2/3
=11又1/3
0.91/5分之4+1.25*1.09
= 0.91×(4/5)+1.25*1.09
=1.25×(0.91+1.09)
=1.25×2
=2.5
48*(5/6+5/8-5/12-7/16)
= 5/6×48+5/8×48-5/12×48-7/16×48
=40+30+20+21
=111
8又1/4-3又2/7-1又5/7+1.75
= (8又1/4+1.75)-(3又2/7+1又5/7)
=10-5
=5
(1/3-1/4)+(1/4-1/5)+(1/5-1/6)
= (-1/4+1/4)-(1/5-1/5)+(1/3-1/6)
=1/6
7*13*(8/7-14/13)
=7×13×(8/7)-14/13×7×13×
=104-98
=6
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