9+18=?
?x25=?
?-333=?
?x8=?
?+554=?
?:2=?
?+14=?
?x5=?
?+692=?
?x20=?
?+9=?
?-32940=??????
Tìm:??????
K
Khách
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Những câu hỏi liên quan
NX
0
24 tháng 6 2018
\(\frac{9^{14}.25^5.8^7}{8^{12}.615^3.25^3}\)
\(=\frac{\left(3^3\right)^{14}.\left(5^2\right)^5.8^7}{8^{12}.\left(3.5.41\right)^3.\left(5^2\right)^3}\)
\(=\frac{3^{42}.5^{10}.8^7}{8^{12}.3^3.5^7.41^3}\)
\(=\frac{3^{39}.5^3}{8^5.41^3}\)
25 tháng 9 2019
a,9.3.4.25
= 27.100
= 2700
b, 12.125.54
= 3.4.125.54
= 125.4.3.54
= 500.162
= 81000
6 tháng 8 2022
c: \(=72\cdot14+72\cdot7+72\cdot19=72\cdot40=2880\)
d: \(=1700\cdot7-1700\cdot6=1700\)
e: Số số hạng là (65-1)/4+1=17(số)
Tổng là: \(\dfrac{65+1}{2}\cdot17=33\cdot17=561\)
TN
7
22 tháng 1 2022
bằng 101606400 à? có đúng không? nếu không thì k cho mình là sai cũng được nhé.
11 tháng 3 2023
5h17p+6h57p*5
=317p+417p*5
=2402p
14p15s:5=855s:5=171s
3h56'+5h15'=236p+315p=551p
7 ngày 13h*7=49 ngày 91h
=52 ngày 19h
17h5p:5=1025p:5=205p
2h18'*8=16h144'=18h24'
8h-3h26p=480p-206p=274p
52p6s:6=3126s:6=521s
KK
cho A=(0,8x7+(0,8)2)(1,25x7-4/5x1,25)+31,64
B=(1,09-0,29)x5/4 /(18,9-16,65)x8/9
Hỏi A gấp mấy lần B?
1
DH
18 tháng 8 2017
Ta có:
\(\dfrac{A}{B}=\dfrac{\left[0,8.7+\left(0,8\right)^2\right]\left(1,25.7-\dfrac{4}{5}.1,25\right)+31,64}{\dfrac{\left(1,09-0,29\right).\dfrac{5}{4}}{\left(18,9-16,65\right).\dfrac{9}{8}}}\)
\(\dfrac{A}{B}=\dfrac{\left[0,8\left(7+0,8\right)\right]\left[1,25\left(7-\dfrac{4}{5}\right)\right]+31,64}{\dfrac{0,8.\dfrac{5}{4}}{2,26.\dfrac{9}{8}}}\)
\(\dfrac{A}{B}=\dfrac{6,24.7,75+31,64}{\dfrac{1}{2,53125}}\)
\(\dfrac{A}{B}=\left(48,36+31,64\right).2,53125\)
\(\dfrac{A}{B}=202,5\)
Vậy.............
Chúc bạn học tốt!!!
10 tháng 7 2021
Câu 6: Giá trị của biểu thức (x2 - 8) x (x + 3) - (x - 2) x (x + 5) tại x=-3là:
A.-4 B.16 C. -10 D. 10
Câu 7:Giá trị của biểu thức 6 + (x5 - 3) x (x3 + 2) - x8 - 2x5 tại x= -1/3 là:
A. -1/9 B. 1/9 C.9 D.-9
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