5/8x3/2=
5/8x3/5=?
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5/6+7/8x3
5/6+7/8x3=5/6+21/8=40/48+126/48=166/48=83/24
\(\dfrac{5}{6}+\dfrac{7}{8}\times3=\dfrac{5}{6}+\dfrac{21}{8}=\dfrac{20}{24}+\dfrac{63}{24}=\dfrac{83}{24}\)
`5/6+ 7/8 xx 3 `
= `5/6 + 21/8`
= `83/24`
tính giá trị biểu thức
1/2x3/4:6/5 2/3+1/6:7/12 8x3/5:12/5 4/9+3/4-1/3
a: \(=\dfrac{1}{2}\cdot\dfrac{3}{4}\cdot\dfrac{5}{6}=\dfrac{15}{48}=\dfrac{5}{16}\)
b: \(=\dfrac{2}{3}+\dfrac{12}{42}=\dfrac{2}{3}+\dfrac{2}{7}=\dfrac{20}{21}\)
c: \(=\dfrac{24}{5}\cdot\dfrac{5}{12}=2\)
d: \(=\dfrac{1}{9}+\dfrac{3}{4}=\dfrac{4+27}{36}=\dfrac{31}{36}\)
Bài 1: \(\dfrac{1}{3}\) + \(\dfrac{2}{4}\) + \(\dfrac{3}{5}\) ...........................3(>,<,=)
A.>
B.<
C.=
Bài 2: \(\dfrac{8x7-8x3}{8x2}\) = ?
A.2
B.3
C.4
D.5
(8x3-12x2+5):(4x2+3)
phân tích đa thức thành nhân tử:2x^2-9x+7;4x^2+9x+5
tính giá trị biểu thức
1/2x3/4:6/5 2/3+1/6:7/12 8x3/5:12/5 4/9+3/4-1/3
\(\dfrac{1}{2}\times\dfrac{3}{4}:\dfrac{6}{5}=\dfrac{3}{8}:\dfrac{6}{5}=\dfrac{5}{16}\)
\(\dfrac{2}{3}+\dfrac{1}{6}:\dfrac{7}{12}=\dfrac{2}{3}+\dfrac{2}{7}=\dfrac{14}{21}+\dfrac{6}{21}=\dfrac{20}{21}\)
\(8\times\dfrac{3}{5}:\dfrac{12}{5}=\dfrac{24}{5}:\dfrac{12}{5}=2\)
\(\dfrac{4}{9}+\dfrac{3}{4}-\dfrac{1}{3}=\dfrac{16}{36}+\dfrac{27}{36}-\dfrac{12}{36}=\dfrac{31}{36}\)
{x mũ 2 - [8 mũ 2 - (5 mũ 2 - 8x3)mũ 3 - 7x9]mũ 3 - 4x12}mũ 3 = 1
2 tick đó nha
5/8+15/16:3/8x3/4=
9/6-1/3:1/2+5/12=
giúp mình nha
Tách các phân số ra giùm cho nhờ cái
Đọc loạn cả r
Bây h đăng câu hỏi khác đi
Kiểu vt tách ra á
\(\frac{5}{8}+\frac{15}{16}:\frac{3}{8}\times\frac{3}{4}=\frac{5}{8}+\frac{15}{8}=\frac{5}{2}.\)
\(\frac{9}{6}-\frac{1}{3}:\frac{1}{2}+\frac{5}{12}=\frac{3}{2}-\frac{2}{3}+\frac{5}{12}=\frac{5}{4}\)
Đề như z ak bn?
i) (3xy3− 12x2y2+ 6xy)2:3xy − xy
j) (10x3− 19x2-4x + 4): (2x + 1)
k) (3x4− 8x3-10x2+ 8x − 5): (3x2− 2x + 1).
j: \(\dfrac{10x^3-19x^2-4x+4}{2x+1}\)
\(=\dfrac{10x^3+5x^2-24x^2-12x+8x+4}{2x+1}\)
\(=5x^2-12x+4\)
tính bằng cách thuận tiện nhất:
a 1+2+3+4+5+6+7+8+9
b 8x3+8x7
c 8x172-8x72
a)1+2+3+4+5+6+7+8+9
=(1+9)+(2+8)+(3+7)+(4+6)+5
=10+10+10+10+5
=10x4+5=45
b)8x3+8x7
=8x(3+7)
=8x10=80
c)8x172-8x72
=8x(172-72)
=8x100=800
a. 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 +9
= (1 + 9) + (2 + 8) + (3 + 7) + ( 4 + 6) + 5
= 10 + 10 + 10 + 10 + 5
= 45