Question

tính bằng cách thuận tiện nhất

(5/8+7/12)+3/8....

2,7+3,59+4,3

Answer 1

5/8 + 7/12 + 3/8 = ( 5/8 + 3/8) + 7/12 = 1 + 7/12 = 19/12

( 2,7 + 4,3) + 3,59 = 7 + 3,59 = 10,59

Answer 2

= 29/24 + 3/8 = 19/12

= ( 2,7 + 4,3) + 3,59 = 7 + 3,59 = 10,59

Answer 3

a) \(\left(\dfrac{5}{8}+\dfrac{7}{12}\right)+\dfrac{3}{8}=\dfrac{5}{8}+\dfrac{7}{12}+\dfrac{3}{8}=\left(\dfrac{5}{8}+\dfrac{3}{8}\right)+\dfrac{7}{12}=1+\dfrac{7}{12}=\dfrac{12}{12}+\dfrac{7}{12}=\dfrac{19}{12}\)

b) \(2,7+3,59+4,3=\left(2,7+4,3\right)+3,59=7+3,59=10,59\)

Answer 4

a)(5/8+7/12)+3/8                                      b)2,7+3,59+4,3

=(5/8+3/8)+7/12                                         =2,7+4,3+3,59

=1+7/12=12/12+7/12=19/12                       =7+3,59=10,59

Answer 5

= 29/24 + 3/8 = 19/12

= ( 2,7 + 4,3) + 3,59 = 7 + 3,59 = 10,59