3.8-7+20
Tính
a) 30: {175:[335-(135+37.5)]}
b)25.17-(23-20)3
c)3.82- [ 4.(12-7)2 ]
Câu1/ Tìm x:
(15.x+3.8):20=(19-9)mũ 2 +5 mũ 2Thực hiện phép tính: a) 25.(-3).(-4).(-7); b) 3.8.(-12).(-5); c) 125.(-3).4.(-30). d) (-7).(-5).(-4).(-2)
Rút gọn biêu thức
A=3^2.45^4-15^3.9^3/3^3.45^4-5^4.3^10
B=6^30.3^11.7-2^31.5.3^40/2^28.17.3^38-6^27.3^11
C=35.27^8+70.9^11/15.81^6-60.3^20
D=4^6.6^7-9^3.8^6/12^5.2^8+18^3.32^3
giải giúp mình với
5/3=(1/3.8/5+8/5+4/7).4/5
5/3+8/5(1/3+4/7).4/5
=5/3+8/5.(7/21+12/21).4/5
=5/3+8/5.19/21.4/5
=5/3+608/525
=857/525+608/525
=1483/525
sửa 5/3+(1/3.8/5+8/5.4/7).4/5 nha xin lỗi mình cần rất gấp
Thực hiện phép tính:
\(\dfrac{5^{10}.7^3-25^5.49^2}{\left(125.7\right)^3+5^9.7^3.8}\)
Giúp nhé
tính \(\frac{25^4.16^3.3^7}{75^4.6^3.8^2}\)
\(\frac{25^4.16^3.3^7}{75^4.6^3.8^2}=\frac{5^8.4^6.3^7}{3^4.25^4.2^3.3^3.2^6}=\frac{3^7.2^{12}.5^8}{3^7.5^8.2^9}=2^3=8\)
3.8 x 4.54 + 3.6 : 1.5 + 5.46 x 3.8 - 2.1 : 1.5
a,5/3-2/3.x=1
b.4/5+5/7:x=1/6
c,1/8.x+4/3.8/7=2/4x.3/4
\(a,\frac{5}{3}-\frac{2}{3}.x=1\)
\(\frac{5}{3}-1=\frac{2}{3}.x\)
\(\frac{2}{3}=\frac{2}{3}.x\)
\(x=\frac{2}{3}:\frac{2}{3}\)
\(x=1\)
\(b,\frac{4}{5}+\frac{5}{7}.x=\frac{1}{6}\)
\(\frac{5}{7}.x=\frac{1}{6}-\frac{4}{5}\)
\(\frac{5}{7}.x=-\frac{19}{30}\)
\(x=-\frac{19}{30}:\frac{5}{7}\)
\(x=-\frac{133}{150}\)