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{ 2 + 4 + 6 + 8 + 10 } x { 72 x 8 x 8 x 8 } = 30 x 36864 = 1105920
* ( 18 - 9 x 2) x ( 2 + 4 + 6 + 8 + 10 )
= (18 – 18) x ( 2 + 4 + 6 + 8 + 10 )
= 0 x ( 2 + 4 + 6 + 8 + 10 )
= 0
A=(ax7+ax8-ax15):(1+2+3+.......+10)
A=0x(1+1+2+3+......+10)
A=0
B=(18-9x2)x(2+4+6+8+10)
B=0x(2+4+6+8+10)
B=0
Tính nhanh
A = (a x 7 + a x 8 - a x 15) : (1 + 2 + 3 + ........ + 10)
A = a x ( 7 + 8 - 15 ) : (1 + 2 + 3 + ........ + 10)
A = a x 0 : (1 + 2 + 3 + ........ + 10)
A = 0 : (1 + 2 + 3 + ........ + 10)
A = 0
B = (18 - 9 x 2) x (2 + 4 + 6 + 8 + 10)
B = ( 18 - 18 ) x (2 + 4 + 6 + 8 + 10)
B = 0 x (2 + 4 + 6 + 8 + 10)
B = 0
Hok Tốt !
# mui #
A = (a x 7 + a x 8 - a x 15) : (1 + 2 + 3 + ........ + 10)
A = [a x ( 7 + 8 - 15 )] : [ ( 1 + 9 ) + ( 2 + 8 ) + ( 3 + 7 ) + ( 4 + 6 ) + 5 ]
A = [a x 0] : [ 10 x 4 + 5 ]
A = 0 : 45
A = 0
B = (18 - 9 x 2) x (2 + 4 + 6 + 8 + 10)
B = (18 - 18) x [ ( 2 + 8 ) + ( 4 + 6 ) + 10 ]
B = 0 x [10 x 3]
B = 0 x 30
B = 0
#Hok_tốt
B = (18 - 9 x 2) x (2 + 4 + 6 + 8 + 10)
B = (18 - 18) x 30
B = 0 x 30
=> B = 0
\(A=\left(a\text{x}7+a\text{x}8-a\text{x}15\right):\left(1+2+3+...+10\right)\)
\(A=\left(a\text{x}\left(7+8-15\right)\right):\left(1+2+3+...+10\right)\)
\(A=\left(a\text{x}0\right):\left(1+2+3+..+10\right)\)
\(A=0:\left(1+2+3+...+10\right)\)
\(A=0\)
\(B=\left(18-9\text{x}2\right)\text{x}\left(2+4+6+8+10\right)\)
\(B=\left(18-18\right)\text{x}\left(2+4+6+8+10\right)\)
\(B=0\text{x}\left(2+4+6+8+10\right)\)
\(B=0\)
2-4+6-8+10-12+4
= (2-4)+(6-8)+(10-12)+4
= (-2) + (-2) + (-2) + 4
= (-2) x 3 + 4
= (-6)+4
= -2
30 x 36864 = 1105920 eeeeeeeeeeeeeeeeeeeeeeeeeee