Question

tính giá trị biểu thức: a) 6 : 5/2 - 3/10     b) 4/6 :4/3 + 4/3     c) 5/2 x 1/3 + 1/4      d) 6/7 : (1/2 x 3/4 ) -5/8

Answer 1

lần này mới được à

Answer 2

? Lần này mới được

Answer 3

a: =6x2/5-3/10

=12/5-3/10

=24/10-3/10=21/10

b: =1/2+4/3=3/6+8/6=11/6

c: =5/6+1/4=10/12+3/12=13/12

Answer 4

a) \(6\div\dfrac{5}{2}-\dfrac{3}{10}=\dfrac{6}{1}\div\dfrac{5}{2}-\dfrac{3}{10}=\dfrac{12}{5}-\dfrac{3}{10}=\dfrac{24}{10}-\dfrac{3}{10}=\dfrac{21}{10}\)

b) \(\dfrac{4}{6}\div\dfrac{4}{3}+\dfrac{4}{3}=\dfrac{1}{2}+\dfrac{4}{3}=\dfrac{3}{6}+\dfrac{8}{6}=\dfrac{11}{6}\)

c) \(\dfrac{5}{2}\times\dfrac{1}{3}+\dfrac{1}{4}=\dfrac{5}{6}+\dfrac{1}{4}=\dfrac{10}{12}+\dfrac{3}{12}=\dfrac{13}{12}\)

d) \(\dfrac{6}{7}\div\left(\dfrac{1}{2}\times\dfrac{3}{4}\right)-\dfrac{5}{8}=\dfrac{6}{7}\div\dfrac{3}{8}-\dfrac{5}{8}=\dfrac{16}{7}-\dfrac{5}{8}=\dfrac{93}{56}\)