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B= 0,175 : 0,25 x 4 -1,09
B= 0,7 x 4 - 1,09
B= 2,8 - 1,09
B= 1,71
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
Hình như là thế này
A,2.308+7,062
=9,370
2,308+9,91
=12,218
B,1,002+25,068+4,03
=(1,002+25,068)+4,03
=26,070 +4,03
=30,100
a, Với x = 1015 , ta có :
\(A=\frac{2002-1998:(1015-16)}{316+6,84:0,01}\)
\(A=\frac{2002-1998:999}{316+\frac{684}{100}:\frac{1}{100}}\)
\(A=\frac{2002-2}{316+\frac{171}{25}\cdot100}\)
\(A=\frac{2000}{316+\frac{171}{1}\cdot4}\)
\(A=\frac{2000}{316+684}=\frac{2000}{1000}=2\)
b, Tự làm
a, giá trị biểu thức = \(\frac{1989+90}{9}\)\(=\)2079:9=231
b,giá trị a để B có kết quả lớn nhất là 7.B=\(\frac{1989+720}{9}\)\(= \) 2709:9=301
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2,8
Ai k mình mình k lại cho
Happy new year
2,8 chac rui