34 + 15 + 6 - 1 = 54.

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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 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
1.
23 + 6 - 4 = ?
24
23
26
25
23 + 6 - 4 = (20) + (3 + 6 - 4) = 20 + 5 = 25
2.
12 + 12 + 12 = ?
35
34
36
32
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
3.
8 + 14 - 8 + 6 = ?
14
16
18
20
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
4.
0 + 2 + 12 + 0 = ?
24
14
10
16
0 + 2 + 12 + 0 = (10) + (2 + 2) = 10 + 4 = 14. You could do this sum just by looking at it
5.
12 + 6 - 2 = ?
16
15
14
17
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
6.
17 - 8 = ?
7
8
9
6
17 - 8 = (10) + (7 - 8) = 10 - 1 = 9
7.
46 - 20 + 12 = ?
38
37
36
35
46 - 20 + 12 = (40 + 10 - 20) + (6 + 2) = 30 + 8 = 38
8.
34 + 15 + 6 - 1 = ?
44
55
54
56
34 + 15 + 6 - 1 = (30 + 10) + (4 + 5 + 6 - 1) = 40 + 14 = 54
9.
10 + 23 + 5 - 1 = ?
36
35
37
38
10 + 23 + 5 - 1 = (10 + 20) + (3 + 5 - 1) = 30 + 7 = 37
10.
2 + 4 + 6 + 7 + 1 = ?
20
19
18
21
2 + 4 + 6 + 7 + 1 = (4 + 6) + (7 + 2 + 1) = 20. Try to group your numbers in lots of ten
Author:  Frank Evans