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a: Để A lớn nhất thì x-99=1
=>x=100
b: A=2012+555/1=2567
a. 2000 + (32,4 : 3 – 2,8) x 0,25
= 2000 + ( 10,8 - 2,8 ) x 0,25
= 2000 + 8 x 0,25
= 2000 x 2
= 4000
b. 40,28 - 20,05 : 12,5 + 1,7
= 40,28 - 1,604 + 1,7
= 38,676 + 1,7
= 40,376
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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
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
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Nguyễn Tất Phúc ko đăng linh tinh
Tl cho đàng hoàng
Còn ko biết TL thì ko nên TL
HT
b NHA
Chúc bạn hok tốt
b nhé bạn