Question

3. Tính bằng cách thuận tiện nhất

a) 18/15 + 7/15 + 12/15 = 

b) 9/7 + 8/7 + 11/7=

Answer 1

a) 18/15 + 7/15 + 12/15 =18/15 + 12/15 + 7/15        

                                    = 30/15 + 7/15

                                     =       37/15

b) 9/7 + 8/7 +11/7 = 9/7 + 11/7 + 8/7 

                         =  20/7  + 8/7 =  28/7 nha . tk mk nhé b

Answer 2

a, 18/15+7/15+12/15= 37/15

b, 9/7+8/7+11/7=28/7=4

Answer 3

a ) \(\frac{18}{15}\)+ \(\frac{7}{15}\)+ \(\frac{12}{15}\)= \(\frac{37}{15}\)

b )\(\frac{9}{7}\)+ \(\frac{8}{7}\)+ \(\frac{11}{7}\)= 4