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NT
0
NH
1
PA
2
16 tháng 10 2021
99999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999+999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999+999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999
LN
Lưu Nguyễn Hà An
CTVHS
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
\(A=\frac{9}{15.18}+\frac{9}{18.21}+.....+\frac{9}{89.92}\)
\(A=3.\left(\frac{3}{15.18}+\frac{3}{18.21}+....+\frac{3}{89.92}\right)\)
\(A=3.\left(\frac{1}{15}-\frac{1}{18}+\frac{1}{18}-\frac{1}{21}+......+\frac{1}{89}-\frac{1}{92}\right)\)
\(A=3.\left(\frac{1}{15}-\frac{1}{92}\right)\)
\(A=3.\frac{77}{1380}=\frac{77}{460}\)
22 tháng 3 2022
A=915.18+918.21+.....+989.92A=915.18+918.21+.....+989.92
A=3.(315.18+318.21+....+389.92)A=3.(315.18+318.21+....+389.92)
A=3.(115−118+118−121+......+189−192)A=3.(115−118+118−121+......+189−192)
A=3.(115−192)A=3.(115−192)
A=3.771380=77460
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
KN
6
6 tháng 12 2021
\(a,\left(65,7-39,8\right):5\times2,6\)
\(=25,9:5\times2,6\)
\(=5,18\times2,6\)
\(=13,468\)
\(b,\left(17,8+9\right):2,5-4,69\)
\(=26,8:2,5-4,69\)
\(=10,72-4,69\)
\(=6,03\)
BO
5 tháng 2 2017
a) A = 13,8 : (5,6 - 4,91) = 13,8 - 0,69
A = 13,11
b) 4 = 13.8 : (5,6 - x)
5,6 - x = 13,8 : 4
5,6 - x = 3,45
x = 5,6 -3,45
x = 2,15
14 tháng 5 2017
a) A = 13,8 : ( 5,6 - 4,91 )
A = 13,8 : 0,69
A = 20
b) 4 = 13,8 : ( 5,6 - x )
5,6 - x = 13,8 : 4
5,6 - x = 3,45
x = 5,6 - 3,45
x = 2,15
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!