1 + 4 + 7 + 3 + 6 + 9
= (1 + 9) + (4 +6) + (7 + 3)
= 10 + 10 + 10
= 30
1 + 4 + 7 + 3 + 6 + 9
= (1 + 9) + (4 + 6) + (3 + 7)
= 10 + 10 + 10
= 10 x 3
= 30
1+4+7+3+6+9
=5+10+15
=15+15
=30
CHUC BAN HOC TOT
1 + 4 + 7 + 3 + 6 + 9
= (1 + 9) + (4 +6) + (7 + 3)
= 10 + 10 + 10
= 30
1 + 4 + 7 + 3 + 6 + 9
= (1 + 9) + (4 + 6) + (3 + 7)
= 10 + 10 + 10
= 10 x 3
= 30
1+4+7+3+6+9
=5+10+15
=15+15
=30
CHUC BAN HOC TOT
1+1+1+1+2+2+2+3+3+3+3+4+4+4+4+5+5+5+5+6+6+6+6+7+7+7+7+8+8+8+8+9+9+9+9+10=
8/9÷3/7=
8/9+2/5=
7/8-1/3=
3/10×1/6=
b.hỗn số
1 2/7+6 5/6=
5 3/4-1/5 =
6 2/9÷4 7/10=
5/3+3/2-7/6=
1+2+3+4+5+6++7+8+9+9+8+7+6+5+4+3+2+1+1+2+3+4+5++6+7+8+9=?
1+2+3+4+5+6+7+8+9+1+2+3+4+5+6+7+8+9+1+2+3+4+5+6+7+8+9 +1028 giúp mk nha
1+2+3+4+5+6+7+8+9+9+9+9+9+8+7+6+5+4+1+23+3=?
Bài 2. > , < , = ?
5/7… 4/3 2/5 …… 6/10 1/4 …… 3/12 27/36 ….. 2/9 7/6 …… 7/9
7/2 …… 2/7 15/23........1 27/9.......2 14/15........1 51/17........4
Sap xep cac phan so sau theo thu tu tu lon den be
8/9; 4/5; 9/8; 3/4; 10/9; 12/12; 7/8; 1/6; 1/4; 3/2; 1/5; 8/7; 6/5; 5/6; 4/3; 6/7; 2/3; 2/15; 1/2;5/4
Tinh Nhanh:
6 2/7 + 7 3/5 + 8 6/9 + 9 1/4 +2/5 + 5/7 + 1/3 + 3/4 + 1967
Tính
a) 4/3*7 + 4/7*11 + 4/11*15 + 4/15*19 + 4/19*23 + 4/23*27
b) 1/2*3 + 1/3*4 + 1/4*5 + 1/5*6 +1/6*7
c) 2/3*5 + 2/5*7 + 2/7*9 + 2/9*11 + 2/11*13 + 2/1*2 + 2/2*3 + 2/3*4 + 2/8*9 + 2/9*10