NOTE: You must start the timer in order to check your answers

800 - 52 =
56 + 225 =
15 × 5 =
0.5 × 50 =
24 ÷ 0.5 =
6.25 - 0.65 =
54m - 900cm =	m
5.85kg + 7.5kg =	kg
144 ÷ 12 =
13 × 3 =