3/2/5........................................................................3.25
tính
0,5. 4/3.25% : 2/5 + 3/5
\(0,5.\frac{4}{3}.25\%:\frac{2}{5}+\frac{3}{5}\)
\(=\frac{1}{2}.\frac{4}{3}.\frac{1}{4}.\frac{5}{2}+\frac{3}{5}\)
\(=\frac{5}{12}+\frac{3}{5}\)
\(=\frac{25}{60}+\frac{36}{60}\)
\(=\frac{71}{60}\)
0,5.4/3.25%:2/5+3/5
= 1/2.4/3.1/4:2/5+3/5
= 2/3.1/4.5/2+3/5
= 1/6.5/2+3/5
= 5/12+3/5
= 25/60+36/60
= 61/60
3.25 - 5. [4 mũ 3 - ( 27 - 5 mũ 2 ) : 1 mũ 18 ]
= 3.25 - 5 . [43 - (27 - 25) : 1]
= 75 - 5 . [64 - 2]
= 75 - 5 . 62
= 75 - 310
= - 245
(29.38-3.25*5+36.36/3)/6.25
( 29,38 - 3,25 x 5 +36,36 : 3 ) : 6,25
= 25,25 : 6,25
= 4,04
[29.38-3.25*5+36.36:3]:6.25
(29.38-3.25*5+36.36/3)/6.25
tính
a |-5|.7^4+7^3.25/7^5.125-7^5.50
b (-0,25)^-5.9^4.(-2)^-3 - 2^-2.6^9/2^9.3^6 +6^6.40
Tính:
a) \(\dfrac{-5}{6}+\dfrac{1}{6}\)
b) \(\dfrac{1}{3}-\dfrac{5}{4}.\dfrac{4}{15}\)
c) \(4.\left(-5\right)^2+\left(-2\right)^3.25\)
d) \(\dfrac{-2}{7}+\dfrac{1}{5}:\dfrac{7}{15}\)
a) \(\dfrac{-4}{6}\)
b) \(\dfrac{1}{3}\)-\(\dfrac{20}{60}\)
= 0
c) \(-20^2\)+(\(-50^3\))
= -400 + (-125000)
=-125400
d) \(\dfrac{-2}{7}\)+\(\dfrac{15}{35}\)
= \(\dfrac{-10}{35}\)+\(\dfrac{15}{35}\)
= \(\dfrac{5}{35}\)=\(\dfrac{1}{7}\)
a) \(\dfrac{-5}{6}+\dfrac{1}{6}=\dfrac{-5+1}{6}=\dfrac{-4}{6}=\dfrac{-2}{3}\)
b) \(\dfrac{1}{3}-\dfrac{5}{4}\cdot\dfrac{4}{15}=\dfrac{1}{3}-\dfrac{1}{3}=0\)
bài 3 : thực hiện phép tính a 2 mũ 5 -19.4 ,b 20-[30-(5-1)mũ 2] , c 187-(24-5.3) mũ 2 ,d 2010 - 2000:[486-2(7 mũ 2-6)] ,e 100:{300:[450-(4.5 mũ 3 - 2.mũ 3.25)]} mong các cậu giúp mik
a: \(=32-76=-44\)
b: \(=20-30+4^2=-10+16=6\)
Tính:
C= 1^2+2^2+3^2+4^2+5^2+...+100^2
D= \(\frac{9^3.25}{18^2-125^2}^3\)
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