Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
\(\text{ a.135 x 345 + 675 : 135 }\)
\(=46575+5\)
\(=46580\)
\(\text{ b.15 400 : 25 : 4 }\)
\(=616:4\)
\(=154\)
\(\text{ c.1224 : 24 + 1416 : 24}\)
\(=\left(1224+1416\right):24\)
\(=2640:24\)
\(=110\)
học tốt
a.135x345+675:135
=46575+5
=46580
b.15400:25:4
=616:4
=154
c.1224:24+1416:24
=(1224+1416):24
=2640:24
=110
k đúng cho mình nha
\(\left(\frac{70}{24}+x-\frac{53}{24}\right):\frac{4}{3}=1\)
\(\left(\frac{70}{24}+x-\frac{53}{24}\right)=\frac{4}{3}\)
\(\frac{70}{24}+x=\frac{4}{3}+\frac{53}{24}\)
\(\frac{70}{24}+x=\frac{32}{24}+\frac{53}{24}\)
\(\frac{70}{24}+x=\frac{88}{24}\)
\(x=\frac{88}{24}-\frac{70}{24}\)
\(x=\frac{18}{24}\)
a) 78 x 31 + 78 x 24 + 78 x 17 x 22 x 72
= 78 x ( 31 + 24 + 17) x 22 x 72
= 78 x 72 x 22 x 72
= ( 78 + 22 ) x 72
= 100 x 72
= 7200
a)
\(\dfrac{7}{24}+\dfrac{11}{6}\\ =\dfrac{7}{24}+\dfrac{11\times4}{6\times4}\\ =\dfrac{7}{24}+\dfrac{44}{24}\\ =\dfrac{7+44}{24}\\ =\dfrac{51}{24}\\=\dfrac{17}{8}\)
b)
\(3+\dfrac{5}{8}\\ =\dfrac{3\times8}{8}+\dfrac{5}{8}\\ =\dfrac{24}{8}+\dfrac{5}{8}\\ =\dfrac{29}{8}\)
c)
\(\dfrac{19}{28}-\dfrac{3}{7}\\ =\dfrac{19}{28}-\dfrac{3\times4}{7\times4}\\ =\dfrac{19}{28}-\dfrac{12}{28}\\ =\dfrac{7}{28}=\dfrac{1}{4}\)
d)
\(\dfrac{53}{21}-1\\ =\dfrac{53}{21}-\dfrac{21}{21}\\ =\dfrac{53-21}{21}\\ =\dfrac{32}{21}\)
a) \(\dfrac{7}{24}+\dfrac{11}{6}=\dfrac{7}{24}+\dfrac{44}{24}=\dfrac{7+44}{24}=\dfrac{51}{24}\)
b) \(3+\dfrac{5}{8}=\dfrac{24}{8}+\dfrac{5}{8}=\dfrac{24+5}{8}=\dfrac{29}{8}\)
c) \(\dfrac{19}{28}-\dfrac{3}{7}=\dfrac{19}{28}-\dfrac{12}{28}=\dfrac{19-12}{28}=\dfrac{7}{28}=\dfrac{1}{4}\)
d) \(\dfrac{53}{21}-1=\dfrac{53}{21}-\dfrac{21}{21}=\dfrac{53-21}{21}=\dfrac{32}{21}\)
Phân số thứ hai là (53/12+17/42):2=135/56
Phân số thứ nhất là 135/56-17/42=337/168
Giá trị của biểu thức 480 - 120 : 4 chia hết cho 2.
1224 : 24 + 1416 : 24
= ( 1224 + 1416 ) : 24
= 2640 : 24
= 110
17 914 : 53 - 954 : 53
= ( 17 914 - 954 ) : 53
= 16 960 : 53
= 320
\(1224\div24+1416\div24\)
\(=\left(1224+1416\right)\div24\)
\(=2640\div24\)
\(=110\)
\(17914\div53-954\div53\)
\(=\left(17914-954\right)\div53\)
\(=16960\div53\)
\(=320\)
\(HT\)