(2+4+6+...+100)x(36x333-108x111)=(2+4+6+...+100)x(36x3x111-108x111)
=(2+4+6+...+100)x(108x111-108x111)
=(2+4+6+...+100)x0
=0
(2+4+6+...+100)x(36x333-108x111)=(2+4+6+...+100)x(36x3x111-108x111)
=(2+4+6+...+100)x(108x111-108x111)
=(2+4+6+...+100)x0
=0
tính nhanh:(2+4+6+.......+100) (36 x 333 -108 X 111 )
mọi người giúp mình với
( 2 + 4 + 6 + ... + 100 ) x ( 36 x 333 - 108 x 111)
Tính nhanh: (2+4+6+...+98+100)*(36*333-108*111)
Tính nhanh :
a) 19 x 64 + 76 x 34
b) 35 x 12 + 65 x 13
c) 136 x 68 + 16 x 272
d) ( 2 + 4 + 6 + ...... + 100 ) x ( 36 x 333 - 108 x 111 )
e ) 19991999 x 1998 - 19981998 x 1999
1, tính nhanh
( 2+4+6+.....+150) x (36 x 333 -108 x 111)
19991999 x 1998 - 19981999 x 1998
A = 1 x 2 + 2 x 3 + 3 x 4 + ........+ 9 x 10
Tính nhanh(hợp lý)
36 x 333 - 108 x 111
tinh nhanh
(2+4+6+....+100)(36*333-108*111)
(2+4+6+.....+100)*(36*333-108*111)
THUC HIEN PHEP TINH ( TINH NHANH NEU CO THE ) :
1) ( 56 x 46 - 25 x 23 ) : 23
2) ( 28 x 54 + 56 x 36 ) : 21 : 2
3) ( 76 x 34 - 19 x 64 ) : ( 38 x 9 )
4) ( 2 + 4 + 6 + .... + 100 ) x ( 36 x 333 - 108 x 111 )
5) ( 5x 411 - 3 x 165 ) : 410
6) 7256 x 4375 - 725
3650 + 4375 x 7255