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NT
0
NH
1
PA
2
16 tháng 10 2021
99999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999+999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999+999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999
LN
Lưu Nguyễn Hà An
VIP
12 tháng 2 2022
Nguyễn Tất Phúc ko đăng linh tinh
Tl cho đàng hoàng
Còn ko biết TL thì ko nên TL
HT
7 tháng 8 2018
a) Thay a và b vào biểu thức ta có :
11,858 x 12 + 2,1 x 9 + 5
= 142,296 + 18,9 + 5
= 161,196 + 5
= 166,196
b) Tương tự
2 tháng 10 2021
Tính giá trị biểu thức a x 12 + 2,1 x b + 5 với a = 19,36 và b = 7,9 ?
Đáp số:
17 tháng 8 2016
\(A=\frac{9}{15.18}+\frac{9}{18.21}+.....+\frac{9}{89.92}\)
\(A=3.\left(\frac{3}{15.18}+\frac{3}{18.21}+....+\frac{3}{89.92}\right)\)
\(A=3.\left(\frac{1}{15}-\frac{1}{18}+\frac{1}{18}-\frac{1}{21}+......+\frac{1}{89}-\frac{1}{92}\right)\)
\(A=3.\left(\frac{1}{15}-\frac{1}{92}\right)\)
\(A=3.\frac{77}{1380}=\frac{77}{460}\)
13 tháng 9 2023
Tại \(a=\dfrac{5}{9}\); \(b=\dfrac{5}{2}\), ta có:
\(\dfrac{3}{4}\cdot\dfrac{5}{9}+\left(\dfrac{5}{2}-\dfrac{1}{2}\right)\)
\(=\dfrac{3\cdot5}{4\cdot3\cdot3}+\dfrac{4}{2}\)
\(=\dfrac{5}{12}+2\) hoặc \(\dfrac{29}{12}\)
KV
13 tháng 9 2023
Thay a = 5/9 và b = 5/2 vào A ta được:
A = 3/4 × 5/9 + (5/2 - 1/2)
= 5/12 + 2
= 29/12
DT
30 tháng 3 2022
\(125,6+45,7:25\times5\) -> Nhân chia trước cộng trừ sau.
\(=125,6+1,828\times5\)
\(=125,6+9,14\)
\(=134,74\)
= \(\dfrac{31}{34}\)
HK
7
30 tháng 8 2016
A = 99 x 1001 + 9 - 99
A = 99 x ( 1001 - 1) + 9
A = 99 x 1000 + 9
A = 99000 + 9
A = 99009
16 tháng 4 2017
Sherlockichi Kazukosho sai rồi
Phải là :A là :
1001 x 99 - 99 = 99 000
Đáp số : 99 000
20,14+ 20,14 * 9 : 20,14 + 20,14 * 9
= 20 , 14 + [( 20 , 14 * 9 ) : 20, 14 ] + ( 20,14 * 9 )
= 210,4
^^ Ok
Thay a vào ta được:
20,14 + 20,14 x 9 : 20,14 + 20,14 x 9
=....
P/s : Thay rùi tính ik!
^^ Học tốt!