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a)
\(2.6^2.3.6^4\text{:}6^5\)
\(=6.6^6.6^5\)
\(=6^7:6^5\)
\(=6^2=36\)
b) \(8.2^5.16:2^{11}\)
\(=2^3.2^5.2^4:2^{11}\)
\(=2^8.2^5:2^{11}\)
\(=2^{12}:2^{11}\)
\(=2\)
c) \(\left(4^4.16\right):\left(4^3.4\right)\)
\(=\left(4^4.4^2\right):4^4\)
\(=4^6:4^4\)
\(=4^2=16\)
a) \(...=2.2^2.3^2.3.2^4.3^4:\left(2^5.3^5\right)=2^7.3^7:2^5.3^5=2^2.3^2=4.9=36\)
b) \(...=2^3.2^5.2^4:2^{11}=2^{12}:2^{11}=2\)
c) \(...=2^8.2^4:\left(2^6.2^2\right)=2^{12}:2^8=2^4=16\)
d) \(...=5.5^3.5^2:5^6=5^6:5^6=1\)
cau1
a)C1:A={4,5,6,7,8,9,10,11,12,13,14}
C2:A={x\(\in\)N/4\(\le\)x<15}
b)tap hop A co so phan tu la : (14-4):1+1=11(phan tu)
cau 2
a)17+162+83+238
=(17+83)+(162+238)
=100+400
=500
b)15.57+43.15
=15.(57+43)
=15.100
=1500
c)2.52-16:4
=2.25-16-4
=50-4
=46
d)52:{40-[30-(6-2)2]}
=52:{40-[30-42]}
=52;{40-[30-16]
=52:{40-14}
=52:26
=2
Bài 1: Thực hiện các phép tính sau:
\(a)\)Chưa rỏ đề
\(b)\)\(5025\div5-25\div5\)
\(=\)\(1005-5\)
\(=\)\(1000\)
\(c)\)\(218-180\div2\div9\)
\(=\)\(218-10\)
\(=\)\(208\)
\(d)\)\(\left(328-8\right)\div32\)
\(=\)\(320\div32\)
\(=\)\(10\)
Bài 1:
a) ( Tôi không nhìn rõ đầu bài )
b) 5025 : 5 - 25 : 5
= ( 5025 - 25 ) : 5
= 5000 : 5
= 1000
c) 218 - 180 : 2 : 9
= 218 - 180 : ( 2 . 9 )
= 218 - 180 : 18
= 218 - 10
= 208
d) ( 328 - 8 ) : 32
= 320 : 32
= 10
\(\left(-\frac{1}{2}\right)^2\cdot2\cdot\frac{7}{4}\div\left(\frac{5}{8}-1\frac{3}{16}\right)\)
\(=\frac{1}{4}\cdot2\cdot\frac{7}{4}\div\left(\frac{10}{16}-\frac{19}{16}\right)\)
\(=\frac{7}{8}\div\left(-\frac{9}{10}\right)\)
\(=\frac{7}{8}\cdot\left(-\frac{10}{9}\right)\)
\(=-\frac{35}{36}\)
-1/2^2.7/4:(5/8-1 3/16)=1/4.7/4:(5/8-19/16)=1/4.7/4:(10/16-19/16)=1/4.7/4:-9/16=1/4.7/4.-16/9=1/4.-28/9=-7/9
300 : 60 - 30 : (10 + 5) - 30
= 50 - 30 : 15 - 30
= 50 - 2 - 30
= 48 - 30
= 18.
2011 + 5 . [300 - 10 . (17 - 7)]
= 2011 + 5 . [300 - 10 . 10]
= 2011 + 5 . [300 - 100]
= 2011 + 5 . 200
= 2011 + 1000
= 3011.
29 - [16 + 3 . (51 - 49)]
= 29 - [16 + 3 . 2]
= 29 - [16 + 6]
= 29 - 22
= 7.
2010 - 2000 : [486 - 2 . (49 - 6)]
= 2010 - 2000 : [486 - 2 . 43]
= 2010 - 2000 : [486 - 86]
= 2010 - 2000 : 400
= 2010 - 500
= 1510.
cái câu 300 :60 - 30 ; ( 10 + 5 ) - 30 Nguyễn Thanh vân sai rồi tề, đáng lẽ 300 : 60 = 5 chớ
(3^16.15+3^16):3^17
=(15:3)^17
=5^17
chúc bạn học giỏi nhớ nha