3/5+1/4+7/20= 5/6-7/24+11/12= 5/6+7/9-3/8=
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3/5+1/4+7/20= 5/6-7/24+11/12= 5/6+7/9-3/8=
7/8-2/5-1/4= 14/15-(2/3-1/5) 19/20+(4/5-7/40)= 7/6-(7/10-1/3)= (全要递等式)
7/8-2/5-1/4= 14/15-(2/3-1/5) 19/20+(4/5-7/40)= 7/6-(7/10-1/3)= (全要递等式)
3/5+1/4+7/20
=12/20+5/20+7/20
=(12+5+7)/20
=24/20
=6/5
5/6-7/24+11/12
=20/24-7/24+22/24
=(20-7+22)/24
=(20-7+22)/24
=35/24
5/6+7/9-3/8
=60/72+56/72-27/72
=(60+56-27)/72
=89/72
7/8-2/5-1/4
=35/40-16/40-10/40
=(35-16-10)/40
=9/40
14/15-(2/3-1/5)
=14/15-2/3+1/5
=14/15-10/15+3/15
=(14-10+3)/15
=7/15
19/20+(4/5-7/40)
= 19/20+4/5-7/40
= 38/40+32/40-7/40
=(38+32-7)/40
=63/40
7/6-(7/10-1/3)
=7/6-(7/10-1/3)
=7/6-7/10+1/3
=35/30-21/30+10/30
=(35-21+10)/30
=24/30
=4/5
=12/20+5/20+7/20
=(12+5+7)/20
=24/20
=6/5
5/6-7/24+11/12
=20/24-7/24+22/24
=(20-7+22)/24
=(20-7+22)/24
=35/24
5/6+7/9-3/8
=60/72+56/72-27/72
=(60+56-27)/72
=89/72
7/8-2/5-1/4
=35/40-16/40-10/40
=(35-16-10)/40
=9/40
14/15-(2/3-1/5)
=14/15-2/3+1/5
=14/15-10/15+3/15
=(14-10+3)/15
=7/15
19/20+(4/5-7/40)
= 19/20+4/5-7/40
= 38/40+32/40-7/40
=(38+32-7)/40
=63/40
7/6-(7/10-1/3)
=7/6-(7/10-1/3)
=7/6-7/10+1/3
=35/30-21/30+10/30
=(35-21+10)/30
=24/30
=4/5
计算1/3+3/4+3/5+5/7+7/8+9/20+10/21+11/24+12/35=?
简算1\3+3\4+2\5+5\7+7\8+9\20+10\21+11\24+12\35=?
1/3+3/4+2/5+5/7+7/8+9/20+11/24+12/35=?
3/1+4/3+5/2+7/5+8/7+20/9+24/11+35/12=
5△2=5+6=11 7△3=7+8+9=24 4△5=4+5+6+7+8
5/8+5/6=( ) 1/7+3/14=( ) 11/18-5/12= 4/9+11/21= 10/11-4/7
3/10÷20= 9÷3/4= 5/8×1/4= 6/11×5/12= 5/9-1/6= 2/3÷4/7= 1/8+3/
2*2/1*3+4*4/3*5+6*6/5*7+8*8/7*9+10*10/9*11+12*12/11*13=
1*1*2*3*4*5*6*7*8*9*10*11*12.*20=?
1+2+3+4+5+6+7+8+9+10+11+12+13+14+.100=?
1+2-3-4+5+6-7-8+9+10-11-12+……+2001=?
1+2+3+4+5+6+7+8+9+10+11+12+13=?