12 x 50 + 8 x 27 + 6 x 52 + 24 x 53
= 24 x 25 + 24 x 9 + 24 x 13 + 24 x 53
= 24 x ( 25 + 9 + 13 + 53 )
=24 x100
= 2400
12 x 50 + 8 x 27 + 6 x 52 + 24 x 53
=24 x 25 + 24 x 9 +24 x 13 + 24 x 53
=24 x(25 + 9 + 13 + 53)
=24x100
=2400
12 x 50 + 8 x 27 + 6 x 52 + 24 x 53
= 24 x 25 + 24 x 9 + 24 x 13 + 24 x 53
= 24 x ( 25 + 9 + 13 + 53 )
=24 x100
= 2400
12 x 50 + 8 x 27 + 6 x 52 + 24 x 53
=24 x 25 + 24 x 9 +24 x 13 + 24 x 53
=24 x(25 + 9 + 13 + 53)
=24x100
=2400
Tính nhanh:
16 x 3 x 21 + 24 x 2 x 52 + 12 x 4 x 27
Tính nhanh:
16 x 3 x 21 + 24 x 2 x 52 + 12 x 4 x 27
12 x 125 x 24 x 50
25 x 125 x 6 x 8 x 4
1. tính nhanh
A= 8 x 12 x 32 + 4 x 27 x 24 + 41 x 6 x 16
Tim x
50 -2 x ( x +1 )=20
Tinh nhanh
147+230+53+70
7*85+27*7-7*12
58*75+58*50-58*25
( x + 2 ) + ( x + 4 ) + ( x + 6 ) + ( x + 8 ) + ... + ( x + 50 ) + ( x + 52 ) =1092
(x+2)+(x+4)+(x+6)+(x+8)+...+(x+50)+(x+52)=1092
( x + 2 ) + ( x + 4 ) + ( x + 6 ) + ( x + 8 ) + ... + ( x + 50 ) + ( x + 52 ) =1092
tìm biết (x+2)+(x+4)+(x+6)+(x+8)+...+(x+50)+(x+52)