Tính nhẩm: a) 2 × 5 = … c) 5 × 3 = … e) 5 × 7 = …

a) 2 × 5 = 10

c) 5 × 3 = 15

e) 5 × 7 = 35

g) 2 × 7 = 14

b) 2 × 6 = 12

d) 5 × 9 = 45

f) 5 × 5 = 25

h) 2 × 9 = 18