Tính 3√1728 : 3√64 theo hai...
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Tính 3√1728 : 3√64 theo hai cách.
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CM
4 tháng 11 2017
Cách 1: 3√1728 : 3√64 = 12:4 = 3
Cách 2: 3√1728:3√64 = 3√(1728/64) = 3√27 = 3
2 tháng 7 2019
Cách 1: 3√1728 : 3√64 = 12:4 = 3
Cách 2: 3√1728:3√64 = 3√(1728/64) = 3√27 = 3
~Học tốt~
KK
0
CM
21 tháng 8 2018
a) (27 -18) : 3 =?
Cách 1: (27 -18) : 3
= 9 : 3 = 3
Cách 2:(27 -18) : 3
= 27 : 3 - 18 : 3
= 9 - 6 = 3
b) (64 - 32) : 8 = ?
Cách 1:(64 - 32) : 8
= 32 : 8 = 4
Cách 2:(64 - 32) : 8
= 64 : 8 - 32 : 8
= 8 - 4 = 4
Nói thêm: Khi chia một hiệu cho một số, ta có thể chia số bị trừ và số trừ cho số đó (nếu chia hết), rồi trừ hai kết quả cho nhau.
(27 -18) : 3
= 27 : 3 - 18 : 3
26 tháng 7 2015
(428-4x) .27=1728
<=> 428-4x = 1728 : 27
<=> 428-4x = 64
<=> 4x = 428 - 64
<=> 4x = 364
<=> x= 364 :4
<=> x= 91
Vậy x= 91
x.x2.x3=64
<=> x1+2+3 = 64
<=> x6 = 64
<=> x6= (+ - 2 )6
=> x = cộng trừ 2
Vậy x= cộng trừ 2
NB
4
DT
Đỗ Thanh Hải
CTVVIP
15 tháng 5 2021
1 samuel johson was the son of a bookseller. samuel johson was born in 1709
samuel johson, who was born in 1709, was the son of a bookseller
2 in 1728 , he went to oxford. he studied at pembroke college in oxford
in 1728 , he went......to oxford, where he studied at pembroke college.........
3 johnson had to leave oxford without a degree . he was too poor to pay the fees
johnson........had to leave oxford, whose fees he was too poor to pay, without a degree....................
4 in 1737 , johnson moved to london . there he wrote poetry, essays and biographies
in 1737, johnson moved to London, where he wrote poetry, essays and biographies
5 in 1746, johnson started to write his dictionary . it took him nine years to complete
in 1746, johnson started......to write his dictonary, which took him nine years to complete...........................
6 in this house , his wife died in 1752 . her name was elizabeth porter
in this house his wife, whose name was elizabeth porter,..died in 1752 ......................
7 samuel johnson died in 1784 . he is buried in westminster abbey
samuel johson, who is buried in westminister abbey, died in 1784.................
8 there are playing a song on the radio. do you like it
9 jane wore a beautiful shirt yesterday. did you see it?
did you see Jane wearing a beautiful shirt yesterday
10 sue is going out with a boy friend . i don't like him
i don't like him, whose sue is going out with
KY
15 tháng 5 2021
I gave you a book. It had many pictures.
→ The book I gave you had many pictures.I am reading a book at the moment. It is very interesting.
→ The book I am reading at the moment is very interesting.You live in a town. The town is very old.
→ The town you live in is very old.The sweets are delicious. I bought them yesterday.
→ The sweets I bought yesterday are delicious.The football match was very exciting. My friend played in it.
→ The football match my friend played in was very exciting.
The letter hasn't arrived yet. I posted it three days ago.
→ The letter In both sentences we find information about the letter. the sentence where 'letter' is the subject (first sentence) is the main information. The additional information ('I posted three days ago') is placed after the subject. The object 'it' from the second sentence is dropped.He lives in a house. The house is not very big.
→ The house he lives in is not very big.They are playing a song on the radio. Do you like it?
→ Do you like the song they are playing on the radio?Jane wore a beautiful shirt yesterday. Did you see it?
→ Did you see the beautiful shirt Jane wore yesterday?Sue is going out with a boy. I don't like him.
→ I don't like the boy Sue is going out with.
→ The book I gave you had many pictures.I am reading a book at the moment. It is very interesting.
→ The book I am reading at the moment is very interesting.You live in a town. The town is very old.
→ The town you live in is very old.The sweets are delicious. I bought them yesterday.
→ The sweets I bought yesterday are delicious.The football match was very exciting. My friend played in it.
→ The football match my friend played in was very exciting.
The letter hasn't arrived yet. I posted it three days ago.→ The letter In both sentences we find information about the letter. the sentence where 'letter' is the subject (first sentence) is the main information. The additional information ('I posted three days ago') is placed after the subject. The object 'it' from the second sentence is dropped.He lives in a house. The house is not very big.
→ The house he lives in is not very big.They are playing a song on the radio. Do you like it?
→ Do you like the song they are playing on the radio?
Jane wore a beautiful shirt yesterday. Did you see it?→ Did you see the beautiful shirt Jane wore yesterday?Sue is going out with a boy. I don't like him.
→ I don't like the boy Sue is going out with.
10 tháng 2 2022
A. 64 : 16 = 4
B. 210 : 30 = 7
C. 504 : 56 = 9
D. 115 : 23 = 5
25 tháng 11 2021
a)Vì có nhiều số 52 nên .52x(3+7)=52x10=520
b)Vì có nhiều số 23 nên.23x(2+6+2)=23x10=230
c)Vì số 64 phép cuối ko có số nhân nên ta coi số đó là 1 nên. 64x7+64x2+64x1=64x(7+2+1)=64x10=640
d)Vì phép tính ở giữa có 2 số 48 cộng nên ta coi đó là 1 nên.48x(3+6+1)=48x10=480
nhé
25 tháng 11 2021
a) 52 x 7 + 52 x 3
= 52 x ( 7 + 3 )
= 52 x 10
= 520
b) 23 x 2 + 6 x 23 + 23 x 2
= 23 x ( 2 + 6 + 2 )
= 23 x 10
= 230
c) 64 x 7 + 64 x 2 + 64
= 64 x 7 + 64 x 2 + 64 x 1
= 64 x ( 7 + 2 + 1 )
= 64 x 10
= 640
d) 48 x 3 + 48 + 48 x 6
= 48 x 3 + 48 x 1 + 48 x 6
= 48 x ( 3 + 1 + 6 )
= 48 x 10
= 480
CM
23 tháng 9 2017
a) (15 +35) : 5 = ?
Cách 1: (15 +35) : 5
= 50 : 5 = 10
Cách 2: (15 +35) : 5
= 15 : 5 + 35 : 5
= 3 + 7 = 10
+) (80 +4) : 4 = ?
Cách 1:(80 +4) : 4
= 84 : 4 = 21
Cách 2:(80 +4) : 4
= 80 : 4 + 4 :4 = 20 +1 = 21
b) 18 : 6 + 24 : 6 = ?
Cách 1: 18 : 6 + 24 : 6
= 3 + 4 = 7
Cách 2: (18 + 24) : 6
= 42 : 6 = 7
+) 60 : 3 + 9 : 3 =?
Cách 1: 60 : 3 + 9 : 3
= 20 + 3 = 23
Cách 2: 60 : 3 + 9 : 3
=(60 +9) : 3 = 23
KS
16 tháng 2 2022
a) (15 +35) : 5 = ?
Cách 1: (15 +35) : 5
= 50 : 5 = 10
Cách 2: (15 +35) : 5
= 15 : 5 + 35 : 5
= 3 + 7 = 10
+) (80 +4) : 4 = ?
Cách 1:(80 +4) : 4
= 84 : 4 = 21
Cách 2:(80 +4) : 4
= 80 : 4 + 4 :4 = 20 +1 = 21
b) 18 : 6 + 24 : 6 = ?
Cách 1: 18 : 6 + 24 : 6
= 3 + 4 = 7
Cách 2: (18 + 24) : 6
= 42 : 6 = 7
+) 60 : 3 + 9 : 3 =?
Cách 1: 60 : 3 + 9 : 3
= 20 + 3 = 23
Cách 2: 60 : 3 + 9 : 3
=(60 +9) : 3 = 23
HT
\(\sqrt[3]{1728}\):\(\sqrt[3]{64}\)
= 12 : 4
= 3 (tính nhanh)
\(\sqrt[3]{1728}\):\(\sqrt[3]{64}\)
=\(\sqrt[3]{12^3}\):\(\sqrt[3]{4^3}\)
= 12 : 4
= 3 nha (mình chả biết đó có phải là 2 cách ko nữa )
Cách 1 chính là 2 cách trùng nhau của bạn Vân, còn cách 2 của mình:
\(\sqrt[3]{1728}:\sqrt[3]{64}=\sqrt[3]{1728:64}=\sqrt[3]{27}=3\)