\(\dfrac{3}{4}\) của 76 là:
76x\(\dfrac{3}{4}\)= 57cm
Đáp số: 57cm
Chúc bạn học tốt
\(\dfrac{3}{4}\)của 76 cm là:
\(\dfrac{3}{4}\).76=57(cm)
Đ/s: 57cm
\(\dfrac{3}{4}\) của 76 cm là : \(\dfrac{3}{4}\) \(\times\) 76 = 57 (cm)
\(\dfrac{3}{4}\) của 76 là:
76x\(\dfrac{3}{4}\)= 57cm
Đáp số: 57cm
Chúc bạn học tốt
\(\dfrac{3}{4}\)của 76 cm là:
\(\dfrac{3}{4}\).76=57(cm)
Đ/s: 57cm
\(\dfrac{3}{4}\) của 76 cm là : \(\dfrac{3}{4}\) \(\times\) 76 = 57 (cm)
\(A=\dfrac{4}{3}.\dfrac{4}{7}+\dfrac{4}{7}.\dfrac{4}{11}+\dfrac{4}{11}.\dfrac{4}{15}+...+\dfrac{4}{95}.\dfrac{4}{99}\)
Tính hợp lí biết:
A = \(\dfrac{\dfrac{1}{2}+\dfrac{1}{3}-\dfrac{1}{4}}{\left(\dfrac{1}{2}+\dfrac{1}{3}-\dfrac{1}{4}\right)-\dfrac{1}{2}.\dfrac{1}{3}.\dfrac{1}{4}}\)
a) A= 11 \(\dfrac{3}{13}\)- ( 3\(\dfrac{4}{7}\)+ 6\(\dfrac{3}{13}\) )
b) B= ( 7\(\dfrac{4}{9}\) + 3\(\dfrac{8}{13}\) ) \(-5\dfrac{4}{9}\)
c) C= \(\dfrac{-2}{7}.\dfrac{5}{11}+\dfrac{-2}{7}.\dfrac{6}{11}+5\dfrac{4}{7}\)
d) D= \(0,7.1\dfrac{3}{5}.30.0,375.\dfrac{4}{7}\)
Cho A\(=\dfrac{\left(3\dfrac{2}{15}+\dfrac{1}{5}\right):2\dfrac{1}{2}}{\left(5\dfrac{3}{7}-2\dfrac{1}{4}\right):4\dfrac{43}{56}}\)
B\(=\dfrac{1,2:\left(1\dfrac{1}{5}\cdot1\dfrac{1}{4}\right)}{0,32+\dfrac{2}{25}}\)
Chứng tỏ A=B
tìm x
a\(\dfrac{5x-3}{3-2x}=\dfrac{2}{3}\)
b\(\left(\dfrac{4}{5}x+\dfrac{2}{3}\right)\div\dfrac{3}{4}=2\)
c\(\dfrac{3}{4}x-\dfrac{1}{3}=\dfrac{3}{5}\)
d\(\dfrac{2}{3}-\dfrac{3}{5}\div x=\dfrac{1}{4}\)
giúp mình nhé
CM: \(\dfrac{1}{4}< A< \dfrac{4}{9}\)
\(A=\dfrac{1}{3^2}+\dfrac{1}{4^2}+\dfrac{1}{5^2}+...+\dfrac{1}{50^2}\)
So sánh A vs \(\dfrac{3}{4}\)
Cho A= \(\dfrac{1}{2^2}+\dfrac{1}{3^2}+\dfrac{1}{4^2}+......+\dfrac{1}{200^2}\)
So sánh
\(A=\dfrac{1}{2^2}+\dfrac{2}{2^3}+\dfrac{3}{2^4}+...+\dfrac{100}{2^{201}}\)
và \(B=\dfrac{1}{2^3}+\dfrac{1}{3^3}+\dfrac{1}{4^3}+...+\dfrac{1}{100^3}\)
tính một cách hợp lí:
A) \(4\dfrac{3}{4}+\left(-0,37\right)+\dfrac{1}{8}+\left(-1,28\right)+\left(-2,5\right)+3\dfrac{1}{12}\)
b) \(\dfrac{3}{5.7}+\dfrac{3}{7.9}+...+\dfrac{3}{59.61}\)
c) \(\dfrac{\dfrac{5}{22}+\dfrac{3}{13}-\dfrac{1}{2}}{\dfrac{4}{13}-\dfrac{2}{11}+\dfrac{3}{2}}\)