100+222+300+444=?
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a, \(24:\left\{300:\left[375-\left(150+15.5\right)\right]\right\}\)
\(=24:\left\{300:\left[375-\left(150+325\right)\right]\right\}\)
\(=24:\left\{300:\left[375-225\right]\right\}\)
\(=24:\left\{300:150\right\}\)
\(=24:2=12\)
b, \(1449:\left[\left(216+184\right):8\right].9\)
\(=1449:\left[400:8\right].9\)
\(=1449:50.9\)
\(=28,98.9=260,82\)
c, \(222+224+......+444\)
\(=\dfrac{\left[\left(444-222\right):2+1\right]\left(444+222\right)}{2}\)
\(=37264\)
d, \(127.36+64.127-127.100\)
\(=127\left(36+64-100\right)\)
\(=127.0=0\)
24:\(\left\{300:\left[375-\left(150+15.5\right)\right]\right\}\)
=24:\(\left\{300:\left[375-15.\left(10-5\right)\right]\right\}\)
=24:\(\left\{300:\left[15.25-15.5\right]\right\}\)
=24:\(\left\{300:\left[15.\left(25-5\right)\right]\right\}\)
=24:\(\left\{300:\left[15.20\right]\right\}\)
=24:\(\left\{300:300\right\}\)
=24:1=24
Trả lời :
222+222=444
444+444=888
\(\downarrow\)
Trả lời
222 + 222 = 444
444 + 444 = 888
Hok tốt
Ok 3-3
a) 10^30 và 2^100
Ta có: 10^30 = (10^3)^10 = 1000^10
2^100 = (2^10)^10 = 1024^10
Do 1024^10 > 1000^10 => 2^100 > 10^30
b) 333^444 và 444^333
Ta có: 333^444 = 111^444 x 3^444
444^333 = 111^333 x 4^333
Tách: 3^444 = (3^4)^111 =81^111 <=>4^333 = (4^3)^111 = 64^111
Mà: {111^444 > 111^333 (1)
{81^111 > 64^111 hay: (3^4)^111 > (4^3)^111 (2)
Từ (1) và (2) ta có:333^444 > 444^333
c) 3^450 =(3^3)^150 =27^150
5^300=(5^2)^150=25^150
vì 27^150 >25^150 =>3^450 > 5^300
vậy 3^450 > 5^300
a) \(10^{30}=\left(10^3\right)^{10}=1000^{10}\)
\(2^{100}=\left(2^{10}\right)^{10}=1024^{10}\)
Mà \(1000^{10}< 1024^{10}\Rightarrow10^{30}< 2^{100}\)
b) \(3^{400}=\left(3^4\right)^{100}=81^{100}\)
\(5^{300}=\left(5^3\right)^{100}=125^{100}\)
Mà \(81^{100}< 125^{100}\Rightarrow3^{400}< 5^{300}\)
c) \(333^{444}=\left(3.111\right)^{444}=3^{444}.111^{444}=\left(3^4\right)^{111}.111^{444}=81^{111}.111^{444}\)
\(444^{333}=\left(4.111\right)^{333}=4^{333}.111^{333}=\left(4^3\right)^{111}.111^{333}=64^{111}.111^{333}\)
Mà \(81^{111}.111^{444}>64^{111}.111^{333}\Rightarrow333^{444}>444^{333}\)
(111 + 222 + 333 + 444 + 555 + 666 + 777 + 888 + 999)x 2.................999 x 2 x 2 x 2 ?
A.(111 + 222 + 333 + 444 + 555 + 666 + 777 + 888 + 999)x 2 > 999 x 2 x 2 x 2 = 9990 > 7992
B.(111 + 222 + 333 + 444 + 555 + 666 + 777 + 888 + 999)x 2 < 999 x 2 x 2 x 2 = 9990 < 7992
C.(111 + 222 + 333 + 444 + 555 + 666 + 777 + 888 + 999)x 2 = 999 x 2 x 2 x 2 = 9990 = 7992
111 + 222 + 333 + 444 x 0 + 111 + 222
= ( 111 + 222 ) + ( 111 + 222 ) + ( 333 + 444 x 0 )
= 333 + 333 + 333
= 333 x 3
= 999
111 +222+333+444 * 0 +111+222 = ?
111 + 222 + 333 + 0 + 111 + 222
= 999 nha
1. 444 x 5 = 222 x 2 x 5 = 222 x 10 = 2220
a.Đúng b.Sai
2. 282 x 5 = 280 + 2 x 5 = 280 x 10 = 2800
a.Đúng b. Sai
3. 4 x 8 x 7 x 25 = (8 x 7) x (25 x4) = 56 x 100 = 5600
a.Đúng b.Sai
4. 25 x 8 x 9 = (25 x 4) x (4 x 9) = 100 x 36 = 3600
a.Đúng b.Sai
1066 nha
= 1066 nha
mk nhanh nhất
k mk nhé