tinh nhanh(2+4+6+....+100)x(36x333-108x111)
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
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Tính nhanh
(2+4+6+...100)x(36x333-108x111)
\(\left(2+4+6+...+100\right).\left(36.333-108.111\right)=\)\(\left(2+4+6+...+100\right).\left(36.3.111-36.3.111\right)\)\(=\left(2+4+6+...+100\right).0\)\(=0\)
1.Tinh nhanh
a)136x68+16x272
b)(2+4+6+...+100)x(36x333-108x111)
c019991999x1998-19981998x199
Tính nhanh
35x12+65x13
(2+4+6+.....100) x( 36x333-108x111)
a) = 35 x 12 + 65 x 12 + 65 = (35 + 65) x 12+ 65 = 100 x 12 + 65 = 1200 + 65 = 1265
b) (2 + 4 + 6 + ...+ 100) x ( 36 x 3 x 111 - 36 x 3 x 111) = (2 + 4 + 6 + ...+ 100) x 0 = 0
35x12+65x13=1265
(2+4+6+.....100) x(36x333-108x111)=0
Ta có
(2 + 4 + 6 + ...+ 100) x ( 36 x 3 x 111 - 36 x 3 x 111)
= (2 + 4 + 6 + ...+ 100) x 0
= 0
hok tốt
(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
( 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
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
bài 2 :thực hiện phép tính sau
h,(2+4+6+...+100)X(36x333-108x111)