Tính A = 2014 x (128 x 68 - 64 x 136) + 2015
Tính A = 2014 x (128 x 68 - 64 x 136) + 2015
A = 2014 x (128 x 68 - 64 x 136) + 2015
A=2014x(8704-8704)+2015
A=2014x0+2015
A=0+2015
A=2015
Tính A = 2014 x (128 x 68 - 64 x 136) + 2015
=2014x(8704-8704)+2015
=2014x0+2015
=0+2015=2015
Tính A = 2014 x (128 x 68 - 64 x 136) + 2015 Giúp mình nha
A = 2014 x (128 x 68 - 64 x 136) + 2015
A = 2014 x 0 + 2015
A = 0 + 2015
A = 2015
Tính A = 2014 x (128 x 68 - 64 x 136) + 2015
2014 x (128 x 68 - 64 x 136) + 2015
2014 x (8704 - 8704) + 2015
2014 x 0 + 2015
0 + 2015
= 2015
A = 2015
A= 2014 * {128 * 68 - 64 * 136}+2015
A= 2014*{128*68-64*136}+2015
A=2014*0+2015
Vậy A=2015
A= 2014 * {128 * 68 - 64 * 136}+2015
TỚ SẼ LIKE CHO
A = 2014 x ( 128 x 68 - 64 x 136 ) + 2015
A = 2014 x 0 + 2015
A = 0 + 2015
A = 2015
Chúc bạn học tốt !
= 2014 x ( 8704 - 8704 ) + 2015
= 2014 x 0 + 2015
A = 0 + 2015 = 2015
tính nhanh :
a, 19 x 64 +76 x 34
b, 35 x 12 + 65 x 13
c, 136 x 68 + 16 x 272
a) 19 x 64 + 76 x 34 = 19 x 64 + 19 x 4 x 34 = 19 x (64 + 4 x 34) = 19 x 200 = 3800
b) 35 x 12 + 65 x 13 = 35 x 12 + 65 x 12 + 65 = 12 x (35 + 65) + 65 = 12 x 100 + 65 = 1265
c) 136 x 68 + 16 x 272 = 136 x 68 + 16 x 2 x 136 = 136 x (68 + 16 x 2) = 136 x 100 = 13600
a) 19 x 64 + 76 x 34 = 19 x 64 + 19 x 4 x 34 = 19 x (64 + 4 x 34) = 19 x 200 = 3800
b) 35 x 12 + 65 x 13 = 35 x 12 + 65 x 12 + 65 = 12 x (35 + 65) + 65 = 12 x 100 + 65 = 1265
c) 136 x 68 + 16 x 272 = 136 x 68 + 16 x 2 x 136 = 136 x (68 + 16 x 2) = 136 x 100 = 13600
Tính hợp lí:
a) 1 + 2 + 3 + 4 + ... + 2014 + 2015
b) 5 + 10 + 15 + ... + 2010 + 2015
c) 140 + 136 + 132 + ... + 64 + 60
Tính nhanh nếu có thể :
a) 19 x 64 + 76 x 34
b) 35 x 12 + 65 x 13
c) 136 x 68 + 16 x 272
a) 19 . 64 + 76 .34 = 38. 32 + 38 . 68
= 38 . (32 + 68) = 38 .100 = 3800
b) 35 . 12 + 65 . 13 = 35 . 12 + 65 . (12 + 1)
= 35 . 12 + 65 . 12 + 65 = 12 . (35 + 65) + 65
= 1200 + 65 = 1265.
c) 136 . 68 + 16 . 272 = 136 . 68 + 32 .136
= 136 . (66 + 32) = 136 . 100 = 13600
k mik nha!
\(a,19\times64+76\times34.\)
\(=38\times32+38\times68\)
\(=38\times\left(68+32\right)\)
\(=38\times100\)
\(=3800\)
\(b,35\times12+65\times13\)
\(=35\times12+65\times\left(12+1\right)\)
\(=35\times12+65\times12+65\)
\(=12\times\left(35+65\right)+65\)
\(=12\times100+65\)
\(=1265\)
\(c,136\times68+16\times272\)
\(=136\times68+32\times136\)
\(=136\times\left(32+68\right)\)
\(=136\times100\)
\(=13600\)