Q1: Finding the missing number (for example: 150, 200, 250, 300, __)

Q2: Adding multiples of 100 (for example, 300 + 400 =)

Q3: Finding the missing number (for example 56 + __ = 60)

Q4: Finding the biggest multiple (for example, what is the biggest multiple of 10 without going past 82)

Q5: Adding 1-digit numbers to 2-digit numbers (for example, 35 + 6 =)

Q6: Adding multiples of 10 (for example, 40 + 70 =)

Q7, 8 and 9: Subtracting 1-digit numbers from 2-digit numbers

Q10: Subtracting 1-digit numbers from 3-digit numbers