a, 1+2+3+4+....+2001+2002=(2002+1).[(2002-1)+1] :2
=2003.1001
= 2005003
a, 1+2+3+4+....+2001+2002=(2002+1).[(2002-1)+1] :2
=2003.1001
= 2005003
tính theo cách hợp lí :
a) 1 + 2 + 3 + .. + 2001 + 2002
b) 132 + 128 + 124 + ... + 76 + 72 + 68
Tính nhanh
22344x36+ 44688 x 82
1+2+3+....+2001+2002
132+128+124+....+76+72+68
02/09/2018 lúc 08:49
1) Tính nhanh
a) 127.1975.4.8.25
b)22344.36+44688.82
c) 1+2+3+..................+2001+2002
d) 132+128+124+..............+76+72+68
Bài 1: tìm x
a) (x+9) + (x-2)+(x+7)+ (x-4)+(x+5) +(x-6)+(x-3)+ (x-8)+(x+1)=95
b) { [( x:2) - ½] :4 - ¼} : 5= 5+ 1/5
Bài 2: tìm X
a) 72 : { 16- [ 47 + ( x-2)]} = 9
b) x + 132 + 128 +124 +... + 76 + 68 = 2016
tìm x
a, [(6 * x - 72) : 2 - 84] * 28 +5628
b, 72 : {16 - [47 + (x - 2)]} =8
c, x + 132 + 128 + 124 + ...+ 76 + 72 + 68 = 2016
(các bạn giải rõ ra nhé)
tinh tong sau : 22344.36+44688.82
B 1+2+3....+2015+2016
C 132+128+124+...+76+72+68
Thực hiện phép tính: (Tính nhanh nếu có thế)
1) 347.2\(^2\)-2\(^2\).(216+184):8
2) 132-[116-(132-128)\(^2\)]
3) 16:{400:[200-(37+46.3)]}
4) {184:[96-124:31]-2}.3651
5) ) 46 – [ (16 + 71 . 4 ) : 15 ]} – 2
6) 33.18 + 72 .42 – 41 .18
7)( 56 . 46 – 25 . 23 ) : 23
8) ( 28 . 54 + 56 . 36 ) : 21 : 2
9) ( 76 . 34 – 19 . 64 ) : ( 38 . 9 )
10) ( 2+ 4 + 6 + ….. + 100 ) . ( 36 . 333 – 108 . 111)
11) ( 5 . 411- 3 .165 ): 410
12) \(\dfrac{7256.4375-725}{3650+4375.7255}\)
Thực hiện phép tính: (Tính nhanh nếu có thế)
1) 347.222-222.(216+184):8
2) 132-[116-(132-128)22]
3) 16:{400:[200-(37+46.3)]}
4) {184:[96-124:31]-2}.3651
5) ) 46 – [ (16 + 71 . 4 ) : 15 ]} – 2
6) 33.18 + 72 .42 – 41 .18
7)( 56 . 46 – 25 . 23 ) : 23
8) ( 28 . 54 + 56 . 36 ) : 21 : 2
9) ( 76 . 34 – 19 . 64 ) : ( 38 . 9 )
10) ( 2+ 4 + 6 + ….. + 100 ) . ( 36 . 333 – 108 . 111)
11) ( 5 . 411- 3 .165 ): 410
12) 7256.4375−725/3650+4375.7255
132+128+124+...+76+72+68 = ?