2/14+3/21=1/7+1/7=2/7
4/5+15/25=4/5+3/5=7/5
21/27+4/9=7/9+4/9=11/9
1/3+7/5=? 3/15+2/5=? 4/6+18/27=? 15/25+6/21=?
bài 1
4/7+4
3+6/11
3-5/7
21/9-2
15/24+2
63/45-20/25
3/4-2/8
6/7-5/8
37/45-5/9
46/39-11/13
5/12+3/4+1/3
1/2+3/7+11/14
7/10-(1/5+1/4)
15/4-2/3-3/4
bài 1 :
3/7 + 4/5 + 4/7.
6/11 + 2/15 + 5/11.
4/9 + 2/5 + 15/27.
6/13 + 9/32 + 21/26.
Rút gọn rồi tính :
a.4/16+1/4
b.15/25+6/10
c.5/9+21/27
1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+22+23+24+25+26=
11/15 + 8/15= Tính phân số
6/7 - 5/21=
25/4 x 16/100
7 x 2/49 =
4/3 : 2/9
5/8 : 25 =
manh mối vụ án
12 15 9 14 7 21 25 5 14 14 7 21 15 9 3 1
chìa khóa anh cả là số 1 (A=1)
1+2+3+46+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+22+23+24+25+26+27+28+29+30+0000000000000000000000000001
1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+22+23+24+25+26+27+28+29+30+31+32+33+34+35+36+37+38+39+40+41+42+43+44+45+46+47+48+49+50
NHỚ KẾT BẠN VỚI MÌNH NHA '-'
