13 / 5 x ...25/13...=5
..9/2.. : 18/19=38/8
13 / 5 x ...25/13...=5
..9/2.. : 18/19=38/8
5/8 x 4/7= 13/19 : 5/38=
Ghi rõ các bước
tính nhanh:17/12 + 3/5 + 19/12 + 8/13 + 2/5 + 18/13
y x 18/5 - y x 3/5 =...
4/6 + 7/13 + 17/9 + 19/13 - 8/9 + 14/6
Tính bằng cách hợp lí nhất
A, 18/11 x 22/19 z 38/9
B, 4/7 x 2/5 + 2/5 x 9/7 + 8/7 x 2/5
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 '-'
tim so trung gian
so sanh 11/19 va 13/18
so sanh 5/9va 7/8
so sanh 5/11va 4/13
13/19 + 18/19 + 17/19
3/5 + 3/16 + 13/16
1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20=?
Bài 1:Tính
a,3/2+5/4+5/8
b,4/5-3/8+2/4
c,3+6/8-5/4
d,5/6-1/2+2
e,3/5+6/11+7/13+2/5+16/11+19/13
g,75/100+18/21+29/32+1/4+3/21+13/32
Giusp mình nhé
1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+...100=