Tính a) 6 x 4 + 30 = b) 6 x 8 – 18 = c) 6 x 7 + 22 =

* Hướng dẫn giải

a) 6 x 4 + 30 = 24 + 30

                        = 54

b) 6 x 8 – 18 = 48 – 18

                        = 30

c) 6 x 7 + 22 = 42 +22

                        = 64

d) 6 x 10 – 25 = 60 – 25

                        = 35