Tính nhanh
35x12+65x13
(2+4+6+.....100) x( 36x333-108x111)
tính nhanh
a,19x64+76x34
b,35x12+65x13
c,135x68+16x272
d,(2+4+6+...+1000)x(36x333-108x111)
mk đâng cần gấp
a, 19 x 64 + 76 x 34
= 19 x 2 x 32 + 38 x 2 x 34
= 38 x 32 + 38 x 68
= 38 x ( 32 + 68 )
= 38 x 100
= 3800
b, 35 x 12 + 65 x 13
= 35 x 12 + 65 x 12 + 65
= ( 35 + 65 ) x 12 + 65
= 100 x 12 + 65
= 1200 + 65
= 1265
d, ( 2 + 4 + 6 + ... + 1000) x ( 36 x 333 - 108 x 111 )
= ( 2 + 4 + 6 + ... + 1000 ) x ( 36 x 3 x 111 - 108 x 111)
= ( 2 + 4 + 6 + ...+ 1000 ) x ( 108 x 111 - 108 x 111 )
= ( 2 + 4 + 6 + ... + 1000 ) x 0
= 0
Câu c chịu
a)19 x 64 + 76 x 34
=> 3800
b) 35 x 12 + 65 x 13
=> 1265
c. 135 x 68 + 16 x 272
=>(135 + 68) x (16 x 272)
=>135132
Tính Nhanh :
(2+4+6+.....+100)x(36x333-108x111)
Ta có:
( 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) X 0
=0
Xin 1 tích đúng
0 nhé bạn hiền
Tính nhanh
(2+4+6+...100)x(36x333-108x111)
\(\left(2+4+6+...+100\right).\left(36.333-108.111\right)=\)\(\left(2+4+6+...+100\right).\left(36.3.111-36.3.111\right)\)\(=\left(2+4+6+...+100\right).0\)\(=0\)
(2+4+6+...+100)x(36x333-108x111) = ?
{2+4+6+.....+100}x {36x333-108x111}
= 0 vì tích sau = 0
36 x 333 - 108x 111
= 36 x 3 x 111 - 108 x 111
= 108x 111 - 108 x 111
= 0
bài 2 :thực hiện phép tính sau
h,(2+4+6+...+100)X(36x333-108x111)
( 2+4+6+....+100) X ( 36X333 - 108X111) = ?
Ta có:
( 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) X 0
=0
tinh nhanh(2+4+6+....+100)x(36x333-108x111)
tính nhanh:
a) 2+4+6+8+...........+100
b) 173 x454+206-453x138-110
c) (2+4+6+..........+100)x(36x333-108x111)
d) 136x68+16x272
e) 19991999x1998-19981998x1999