Question

Bài 1 : Tính

a) 3/7 + 9/8 = ?

b) 4/5 - 2/15 = ? 

c) 8/11 x 33/5 = ?

d) 4: 1/7 = ?

 

Answer 1

87/56

2/3

24/25

28

Answer 2

87/56

2/3

24/25

28

Answer 3

a \(\dfrac{24}{56}+\dfrac{63}{56}=\dfrac{87}{56}\)

b \(\dfrac{12}{15}-\dfrac{2}{15}=\dfrac{10}{15}=\dfrac{2}{3}\)

c \(\dfrac{8}{11}\times\dfrac{33}{5}=\dfrac{24}{5}\)

d \(4:\dfrac{1}{7}=4\times7=28\)

Answer 4

a) \(\dfrac{87}{56}\)

b) \(\dfrac{2}{3}\)

c) \(\dfrac{24}{5}\)

d) 28

Answer 5

a/=24/56+63/56

=87/56=2/3

b/=13/15+(-2)/15

=11/15

c/=264/55

=24/5

d/=4x7/1=28

 

Answer 6

^87/56

^2/3

^24/25

²⁸