Question

 Tính

a) 9 x 4 + 9 = ...............

                  = ...............

b) 9 x 6 + 9 = ...............

                  = ...............

c) 9 x 5 + 9 = ...............

                  = ...............

d) 9 x 7 + 9 = ...............

                  = ...............

Answer 1

a) 9 x 4 + 9 = 36 + 9 = 45

b) 9 x 6 + 9 = 54 + 9 = 63

c) 9 x 5 + 9 = 45 + 9 = 54

d) 9 x 7 + 9 = 63 + 9 = 72