\(\dfrac{24x101-24}{36x22+72x89}\)= ?
Những câu hỏi liên quan
24x101-24:0.01
24 x 101 - 24 : 0,01
=24 x 101 - 24 x 100
=24 x ( 101 - 100 )
=24 x 1
=24
Đúng 0
Bình luận (0)
24*101-24:0,01
=24*101-24*100
=24*(101+100)
=24*201
=............
Đúng 0
Bình luận (0)
Tính nhanh : 36x22+72x39
36 x 22 + 72 x 39
= 36 x 22 + 36 x 2 x 39
= 36 x 22 + 36 x 78
= 36 x (22+78)
= 36 x 100
= 3 600
Đúng 2
Bình luận (0)
\(\dfrac{19}{37}-\dfrac{31}{24}-\dfrac{-19}{37}+1\dfrac{7}{24}-\dfrac{2}{13}\)
Sửa đề : \(-\dfrac{19}{37}=\dfrac{19}{37}\)
\(\dfrac{19}{37}-\dfrac{31}{24}-\dfrac{19}{37}+1\dfrac{7}{24}-\dfrac{2}{13}\)
\(=\dfrac{19}{37}-\dfrac{31}{24}+\dfrac{19}{37}+\dfrac{31}{24}-\dfrac{2}{13}\)
\(=\left(\dfrac{19}{37}-\dfrac{19}{37}\right)+\left(-\dfrac{31}{24}+\dfrac{31}{24}\right)-\dfrac{2}{13}=-\dfrac{2}{13}\)
Đúng 0
Bình luận (1)
Sửa đề: \(\dfrac{19}{37}-\dfrac{31}{24}+\dfrac{-19}{37}+1\dfrac{7}{24}-\dfrac{2}{13}\)
Ta có: \(\dfrac{19}{37}-\dfrac{31}{24}+\dfrac{-19}{37}+1\dfrac{7}{24}-\dfrac{2}{13}\)
\(=\left(\dfrac{19}{37}+\dfrac{-19}{37}\right)+\left(\dfrac{-31}{24}+1+\dfrac{7}{24}\right)-\dfrac{2}{13}\)
\(=\dfrac{-2}{13}\)
Đúng 0
Bình luận (1)
\(\dfrac{19}{37}-\dfrac{31}{24}-\dfrac{-19}{37}+1\dfrac{7}{24}-\dfrac{2}{13}=\dfrac{19}{37}-\dfrac{31}{24}+\dfrac{19}{37}+\dfrac{31}{24}-\dfrac{2}{13}=\left(\dfrac{19}{37}+\dfrac{19}{37}\right)+\left(\dfrac{-31}{24}+\dfrac{31}{24}\right)-\dfrac{2}{13}=\dfrac{38}{31}+0-\dfrac{2}{13}=\dfrac{122}{403}\)
Đúng 0
Bình luận (2)
\(\dfrac{9}{24}-\dfrac{7}{41}+\dfrac{15}{24}+0,75-\dfrac{34}{41}\)
\(=\left(\dfrac{9}{24}+\dfrac{15}{24}\right)-\left(\dfrac{7}{41}+\dfrac{34}{41}\right)+0,75=1-1+0,75=0,75\)
Đúng 2
Bình luận (1)
bài 2:
\(\dfrac{11}{12}\)-\(\dfrac{5}{12}\)=...... \(\dfrac{25}{24}\)-\(\dfrac{16}{24}\)=...... \(\dfrac{27}{36}\)-\(\dfrac{15}{36}\)=.......
11/12-5/12=6/12=1/2
25/24-16/24=9/24=3/8
27/36-15/36=12/36=2/3
k cho mik nhé
tính hợp lí
\(\dfrac{18}{37}+\dfrac{8}{24}+\dfrac{19}{37}-1\dfrac{23}{24}+\dfrac{2}{3}\)
\(\left(\dfrac{18}{37}+\dfrac{19}{37}\right)+\left(\dfrac{8}{24}-\dfrac{47}{24}\right)+\dfrac{2}{3}=\dfrac{37}{37}-\dfrac{13}{8}+\dfrac{2}{3}=\dfrac{1}{24}\)
Đúng 3
Bình luận (3)
SS A và B
A=\(\dfrac{19}{24}-\dfrac{1}{2}-\dfrac{1}{3}-\dfrac{7}{24}\)
B=\(\dfrac{7}{24}+\dfrac{5}{6}+\dfrac{1}{4}-\dfrac{3}{7}-\dfrac{5}{15}\)
\(A=\frac{19}{24}-\frac{1}{2}-\frac{1}{3}-\frac{7}{24}\)
\(A=\frac{19}{24}+\frac{-1}{2}+\frac{-1}{3}+\frac{-7}{24}\)
\(A=\left(\frac{19}{24}+\frac{-7}{24}\right)+\frac{-1}{2}+\frac{-1}{3}\)
\(A=\frac{1}{2}+\frac{-1}{2}+\frac{-1}{3}\)
\(A=0+\frac{-1}{3}=\frac{-1}{3}\)
\(B=\frac{7}{24}+\frac{5}{6}+\frac{1}{4}-\frac{3}{7}-\frac{5}{15}\)
\(B=\frac{7}{24}+\frac{5}{6}+\frac{1}{4}+\frac{-3}{7}+\frac{-1}{3}\)
\(B=\left(\frac{49}{168}+\frac{140}{168}+\frac{42}{168}\right)+\left(\frac{-72}{168}+\frac{-56}{168}\right)\)
\(B=\frac{231}{168}+\frac{-128}{168}=\frac{103}{168}\)
Có: \(A=\frac{-1}{3}=\frac{\left(-1\right)\cdot56}{3\cdot56}=\frac{-56}{168}\)
Mặt khác: \(-56< 103\)
\(\Rightarrow\)\(\frac{-56}{168}< \frac{103}{168}\)
\(hay\) \(A< B\)
Đúng 0
Bình luận (0)
20 tháng 10 2021 lúc 12:48
\(\dfrac{11}{24}-\dfrac{5}{41}+\dfrac{13}{24}+0.5-\dfrac{36}{41}\) nhớ cho cách lm nhá
=(11/24 + 13/24) + (-5/41 - 36/41) + 0.5
= 1 + (-1) + 0.5
= 0 + 0.5
= 0.5
Đúng 1
Bình luận (0)
\(\dfrac{36}{24}\)=\(\dfrac{36:}{24}\)
\(\dfrac{36}{24}=\dfrac{36:12}{24:12}=\dfrac{3}{2}\)
Đúng 0
Bình luận (0)