4 + 4 + 4 + 4 + 4 + 4 + 4 + 4 + 4 x 2 : 2
= 32 + 4 x 2 : 2
= 32 + 8 : 2
= 32 + 4
= 36
4 + 4 + 4 + 4 + 4 + 4 + 4 + 4 + 4 x 2 : 2 = 36
4+4+4+4+4+4+4+4+4+4x2:2=4+4+4+4+4+4+4+4+4x(2:2)=4+4+4+4+4+4+4+4+4x1=4x9=36
4 + 4 + 4 + 4 + 4 + 4 + 4 + 4 + 4 x 2 : 2
= 32 + 4 x 2 : 2
= 32 + 8 : 2
= 32 + 4
= 36
4 + 4 + 4 + 4 + 4 + 4 + 4 + 4 + 4 x 2 : 2 = 36
4+4+4+4+4+4+4+4+4+4x2:2=4+4+4+4+4+4+4+4+4x(2:2)=4+4+4+4+4+4+4+4+4x1=4x9=36
Tính nhanh:
3 - [2/4 x 1/2 + 2/4 x 3/2 + 24/8 x 2/4 + 2/4]
(2/3 + 3/4 + 4/5 + .........+ 2016 /2017 ) x ( 1/2 + 2/3 + 3/4 + ......+ 2015 /2016) - ( 1/2 + 2/3 + 3/4 + ........2016 /2017 ) x 2/3 + 3/4 + 4/5 + .....+ 2015/2016)
Tính: (2/3 + 3/4 + 4/5 + ... + 2016/2017) x (1/2 + 2/3 + 3/4 + ... + 2015/2016) – (1/2 + 2/3 + 3/4 + ... + 2016/2017) x (2/3 + 3/4 + 4/5 + ... + 2015/2016).
Bài 2 tìm x biết a, x+4/7=7/4-1/4 b,9/2+(x-3/4)=25/4
(2/3 + 3/4 + 4/5 +... + 2016/2017) x (1/2 + 2/3 + 3/4 + ...+ 2015/2016) - (1/2 + 2/3 + 3/4 +...+2015/2016) x (2/3 + 3/4 + 4/5 +...+2015/2016)
13 x 4/15 + 4 x 4/15 - 2 x 4/15
Bài 2:
a) ( 1/4 :5 x 1/3 x 1/4 ) : ( 2/3 + 1/5 :4 )
b) ( 3/4 :5 + 1/2:3/5 ) x ( 4/5 + 1/3 x2 )
Tìm x biết :
x + 4/5 = 4/5 + ( 3/7 + 3/5 ) 5/7 + x/35 = 4/5
x < 3/4 + 2 2/3 + 1 < x < 5/6 + 4
x< 5/6 - 3/4 2/3 < x < 2 - 5/6
(2/3 +3/4 +4/5+...+ 2016/2017) x ( 1/2+ 2/3+ 3/4+... + 2015/2016) - ( 1/2 + 2/3+ 3/4+ .... +2016/2017) x ( 2/3+ 3/4+ 4/5+... + 2015/2016) = ?
Giải chi tiết giúp mình nhé,