1+2+3+4+5+6+7+8+9:9
=1+2+3+4+5+6+7+8+1
=(1+1)+(2+8)+(3+7)+(4+6)+5
=2+10+10+10+5
=(2+5)+(10+10+10)
=7+30
=37
1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 : 9
= ( 1 + 9 ) + ( 2 + 8 ) + ( 3 + 7 ) + ( 4 + 6 ) + 5 : 9
= 10 + 10 + 10 + 10 + 5 : 9
= 20 + 20 + 5 : 9
= 40 + 5 : 9
= 45 : 9
= 5
Tinh bang cach thuan tien nhat
3/2 + 4/9 + 4/7 + 5/9
tinh bang cach thuan tien nhat
a(6/11 + 5/11)*3/7
b.3/5 * 7/9 +3/5*2/9
c.(6/7 - 4/7) : 2/5
d.(8/15 : 2/11 + 7/15 : 2/11
bai 4: tinh bang cach thuan tien nhat: a, 5/9*5/2+4/9*5/2 , b, 12*3/4-3/4*12/7 lam kieu gi
giup minh voi
tinh bang cach thuan tien nhat a.3/5+4/7+2/5+1/7+2/7 b.1/3+1/6+4/3+2/6+2/3
tinh bang cach thuan tien nhat
59/18 + 75/14 + 46/9 + 5/2 + 47/18 + 15/7
tinh bang cach thuan tien nhat
54nhan 2 nhan 9 nhan 5
Tinh bang cach thuan tien nhat
4/7-2/5+17/7-3/5
giup minh voi minh dang can gap
tinh bang cach thuan tien nhat
a) 2/5 + 1/6 + 3/5
b) 9/13 + 4/13 + 2/3
tinh bang cach thuan tien nhat
160:[5*16]
[125*36] :[5*9]
