1,Rút gọn
a,\(\frac{2.5.16}{26-35}\)
b,\(\frac{17.5-17}{3-20}\)
c,\(\frac{49+7.49}{49}\)
Rút gọn các phân số sau thành phân số tối giản . \(\frac{11}{-143}\) ; \(\frac{-26}{-156}\) ; \(\frac{49+7.49}{49}\) ; \(\frac{17.5-17}{3-20}\)
Bài 4: Rút gọn các phân số sau :
a) \(\frac{17.5-17}{3-20}\) b) \(\frac{49+7.49}{49}\)
a.\(\frac{17.5-17}{-17}=\frac{17.4}{-17}=-4\)
b.\(\frac{49.8}{49}=8\)
a) \(\frac{17.5-17}{3-20}\)= \(\frac{85-17}{3-20}\)= \(\frac{68}{-17}\)=-4
b) \(\frac{49+7.49}{49}\)= \(\frac{49+343}{49}\)= \(\frac{392}{49}\)= 8
CHÚC BẠN HỌC TỐT
rút gọn các phân số sau:
a,\(\dfrac{8.5-8.2}{16}\)
b,\(\dfrac{2.14}{7.8}\)
c\(\dfrac{11.4-11}{2-13}\)
d,\(\dfrac{17.5-17}{3-20}\)
e,\(\dfrac{49+7.49}{49}\)
a. \(\dfrac{8,5-8,2}{16}=\dfrac{0,3}{16}=\dfrac{3}{160}\)
b. \(\dfrac{2\cdot14}{7\cdot8}=\dfrac{1\cdot2}{1\cdot4}=\dfrac{2}{4}=\dfrac{1}{2}\)
c. \(\dfrac{11\cdot4-11}{2-13}=\dfrac{11\left(4-1\right)}{-11}=\dfrac{1\cdot3}{-1}=-3\)
d. \(\dfrac{49+7\cdot49}{49}=\dfrac{49\cdot\left(1+7\right)}{49}=\dfrac{8}{1}=8\)
rút gọn phân số :
17.5-17 / 3 - 20
49+7.49 / 49
3.21 / 14.15
các bạn ơi giúp mình đi , ai nhanh nhất nhé ! "/" có nghỉa là phần !!!!
Bài 1: rút gọn phân số
\(1,\frac{9.6-9.3}{18}\) \(5,\frac{2^2.3^2-2.3}{2.3^2}\)
\(2,\frac{17.5-17}{3-20}\) \(6,\frac{2^{10}.3^{10}-2^{10}.3^9}{2^9.3^{10}}\)
\(3,\frac{49+7.49}{49}\)
\(4,\frac{153.24-153.11}{7-160}\)
Rút gọn :\(y=\frac{49+7.49}{49}\)
\(y=\frac{49+7.49}{49}=\frac{49.\left(7+1\right)}{49}=\frac{49.8}{49}=8\)
Giúp mình với các bạn ơi!
Bài 1: Rút gọn phân số:
a) \(\frac{17.5-17}{3-20}\)
b) \(\frac{49+7.49}{98}\)
c*) \(\frac{7}{9.10^2-2.10^2}\)
Bài 2*:
a) Chứng minh: M = \(\frac{n-1}{n-2}\)\(\left(n\in Z;n\ne2\right)\)là phân số tối giản.
b) Chứng minh: M= \(\frac{2n+1}{n}\)\(\left(n\in Z;n\ne0\right)\)là phân số tối giản.
Rút gọn:
a/ \(\frac{4\cdot7}{9\cdot32}\)
b/ \(\frac{3\cdot21}{14\cdot15}\)
c/ \(\frac{2\cdot5\cdot13}{26\cdot35}\)
d/ \(\frac{9\cdot6-9\cdot3}{18}\)
e/ \(\frac{17\cdot5-17}{3-20}\)
f/ \(\frac{49+7\cdot49}{49}\)
a,\(\frac{4.7}{9.32}=\frac{7}{9.8}=\frac{7}{72}\)
a) \(\frac{4.7}{9.32}\)=\(\frac{28}{288}\)=\(\frac{7}{72}\)
b)\(\frac{3.21}{14.15}\)=\(\frac{63}{210}\)=\(\frac{3}{10}\)
c)\(\frac{2.5.13}{26.35}\)=\(\frac{130}{910}\)=\(\frac{1}{7}\)
d)\(\frac{9.6-9.3}{18}\)=\(\frac{27}{18}\)=\(\frac{3}{2}\)
e)\(\frac{17.5-17}{3-20}\)=\(\frac{68}{-17}\)=\(-4\)
f)\(\frac{49+7.49}{49}\)=\(\frac{392}{49}\)=\(8\)
\(a,\frac{4.7}{9.32}=\frac{4.7}{9.4.8}=\frac{7}{9.8}=\frac{7}{72}\)
\(b,\frac{3.21}{14.15}=\frac{3.3.7}{2.7.3.5}=\frac{3}{2.5}=\frac{3}{10}\)
\(c,\frac{2.5.13}{26.35}=\frac{2.5.13}{13.2.5.7}=\frac{1}{7}\)
\(d,\frac{9.6-9.3}{18}=\frac{9.\left(6-3\right)}{18}=\frac{9.3}{18}=\frac{9.3}{2.9}=\frac{3}{2}\)
\(e,\)\(\frac{17.5-17}{3-20}=\frac{17.\left(5-1\right)}{-17}=\frac{17.4}{-17}=\frac{-17.\left(-4\right)}{-17}=-4\)
\(f,\frac{49+7.49}{49}=\frac{49.\left(1+7\right)}{49}=\frac{49.8}{49}=8\)
Bài 1: Rút gọn phân số.
a, 4.7/ 9.32
b, 3.21/ 14.15
c, 2.5.13/ 26.35
d, 9.6-9.3/ 18
e, 17.5-17/ 3-20
f, 49+7.49/ 49
Giúp mk với, cảm ơn các bn nhiều.
a) 4.79.32=4.79.4.8=79.8=772
b) 3.2114.15=3.3.72.7.3.5=32.5=310
c) 2.5.1326.35=2.5.132.13.5.7=17
d) 9.6–9.318=9.(6–3)9.2=6–32=32
e) 17.5–173–20=17.(5–1)–17=5–1–1=–4
f)
a) \(\dfrac{4.7}{9.32}=\dfrac{4.7}{9.4.8}=\dfrac{7}{72}\)
b) \(\dfrac{3.21}{14.15}=\dfrac{3.3.7}{2.7.3.5}=\dfrac{3}{10}\)
c) \(\dfrac{2.5.13}{26.35}=\dfrac{2.5.13}{2.13.5.7}=\dfrac{1}{7}\)
d) \(\dfrac{9.6-9.3}{18}=\dfrac{9\left(6-3\right)}{9.2}=\dfrac{3}{2}\)
e) \(\dfrac{17.5-17}{3-20}=\dfrac{17\left(5-1\right)}{-17}=\dfrac{5-1}{-1}=-4\)
f) \(\dfrac{49+7.49}{49}=\dfrac{49\left(1+7\right)}{49}=8\)