Bài 2 tính chậm:
P/S: Lấy máy tính ra mà tính
a , 55 x 11 + 55 x 9 - 55 x 20 = 55 x ( 11 + 9 - 20 )
= 55 x 0 = 0
a , 55 x 11 + 55 x 9 - 55 x 20 = 55 x ( 11 + 9 - 20 )
= 55 x 0 = 0
a , 55 x 11 + 55 x 9 - 55 x 20 = 55 x ( 11 + 9 - 20 )
= 55 x 0 = 0
a , 55 x 11 + 55 x 9 - 55 x 20 = 55 x ( 11 + 9 - 20 )
= 55 x 0 = 0
a , 55 x 11 + 55 x 9 - 55 x 20 = 55 x ( 11 + 9 - 20 )
= 55 x 0 = 0
a , 55 x 11 + 55 x 9 - 55 x 20 = 55 x ( 11 + 9 - 20 )
= 55 x 0 = 0
A) 55x11+55x9-55x20=22x(11+9-20)=22x0=0
B) 24x18-48x9+100=24x18-24x9x2+100=24x(18-18)+100=0+100=100
a , 55 x 11 + 55 x 9 - 55 x 20 = 55 x ( 11 + 9 - 20 )
= 55 x 0 = 0
a , 55 x 11 + 55 x 9 - 55 x 20 = 55 x ( 11 + 9 - 20 )
= 55 x 0 = 0
a , 55 x 11 + 55 x 9 - 55 x 20 = 55 x ( 11 + 9 - 20 )
= 55 x 0 = 0
a , 55 x 11 + 55 x 9 - 55 x 20 = 55 x ( 11 + 9 - 20 )
= 55 x 0 = 0
a , 55 x 11 + 55 x 9 - 55 x 20 = 55 x ( 11 + 9 - 20 )
= 55 x 0 = 0
a , 55 x 11 + 55 x 9 - 55 x 20 = 55 x ( 11 + 9 - 20 )
= 55 x 0 = 0
55x11+55x9-55x20
=55x(11+9-20)
=55x0
=0
\(A,55\cdot11+55\cdot9-55\cdot20\)
\(=55\cdot\left(11+9-20\right)\)
\(=55\cdot0=0\)
\(B,24\cdot18-48\cdot9+100\)
\(=24\cdot18-24\cdot2\cdot9+100\)
\(=24\cdot\left(18-18\right)+100\)
\(=24\cdot0+100=100\)
Chấm là nhân nha
T i c k nha
a , 55 x 11 + 55 x 9 - 55 x 20 = 55 x ( 11 + 9 - 20 )
= 55 x 0 = 0
a , 55 x 11 + 55 x 9 - 55 x 20 = 55 x ( 11 + 9 - 20 )
= 55 x 0 = 0
a , 55 x 11 + 55 x 9 - 55 x 20 = 55 x ( 11 + 9 - 20 )
= 55 x 0 = 0
a , 55 x 11 + 55 x 9 - 55 x 20 = 55 x ( 11 + 9 - 20 )
= 55 x 0 = 0
a) 55 x 11 + 55 x 9 - 55 x 20
= 55 x (11+9-20 )
= 55 x 0
= 0
b) 24 x 18 -48 x 9 + 100
= 24 x 18 : 2 - 24 x 2 x 9 +100
= 0+100
=100
a.0
b.100
a là 0
b là 100 nha
A, 55 x [ 11 + 9 - 20 ] = 0
