34 + 15 + 6 - 1 = 54.

# Addition and Subtraction (Very Easy)

Addition and subtraction sums include the plus or minus sign. If you are worried about your addition and subtraction - don't be! With practice, they are very easy operations to carry out.

In this first quiz, you'll get some practice with dealing with really easy numbers. TIP: With numbers less than 100, add the tens first and then add the units. For example:

• 12 + 16 + 22 = (10 + 10 + 20) + (2 + 6 + 2) = 40 + 10 = 50

Play this 11-plus Maths quiz and if you get full marks, move onto the Easy quiz in this series, and so on. When you've got all 40 questions correct ~ without using a pencil and paper ~ then you will have a really good grasp of addition and subtraction.

1. 17 - 8 = ?
17 - 8 = (10) + (7 - 8) = 10 - 1 = 9
2. 10 + 23 + 5 - 1 = ?
10 + 23 + 5 - 1 = (10 + 20) + (3 + 5 - 1) = 30 + 7 = 37
3. 34 + 15 + 6 - 1 = ?
34 + 15 + 6 - 1 = (30 + 10) + (4 + 5 + 6 - 1) = 40 + 14 = 54
4. 46 - 20 + 12 = ?
46 - 20 + 12 = (40 + 10 - 20) + (6 + 2) = 30 + 8 = 38
5. 12 + 12 + 12 = ?
12 + 12 + 12 = (10 + 10 + 10) + (2 + 2 + 2) = 30 + 6 = 36. Obviously, if you know that 12 × 3 = 36, you won't follow this procedure. Always BE ON THE LOOKOUT for short cuts
6. 2 + 4 + 6 + 7 + 1 = ?
2 + 4 + 6 + 7 + 1 = (4 + 6) + (7 + 2 + 1) = 20. Try to group your numbers in lots of ten
7. 23 + 6 - 4 = ?
23 + 6 - 4 = (20) + (3 + 6 - 4) = 20 + 5 = 25
8. 0 + 2 + 12 + 0 = ?
0 + 2 + 12 + 0 = (10) + (2 + 2) = 10 + 4 = 14. You could do this sum just by looking at it
9. 12 + 6 - 2 = ?
TIP: With numbers less than 100, add the tens first and then add the units. 12 + 6 - 2 = (10) + (2 + 6 - 2) = 10 + 6 = 16
10. 8 + 14 - 8 + 6 = ?
8 + 14 - 8 + 6 = (14 + 6) = 20. Cross out identical pairs of numbers that differ only in sign, e.g. +8 - 8 = 0. Don't waste your time adding them to your final calculations

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