Adding in a Different Order
4 + 2 gives the same answer as 2 + 4. Whichever way round you put the numbers you still get the answer 6.

Adding in a Different Order

This Math quiz is called 'Adding in a Different Order' and it has been written by teachers to help you if you are studying the subject at elementary school. Playing educational quizzes is a fun way to learn if you are in the 1st or 2nd grade - aged 6 to 8.

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In Year 2, children are encouraged to check their addition calculations. They might do this by adding the numbers up again, but in a different order. For example, if they add up 6 + 9 + 4, they may check it by recognizing that 6 + 4 makes 10, and 9 more is 19, or they may do it differently by adding 4 + 9 to make 13 then adding 6 to give 19. This is called the commutative property and means that addition calculations can be done in any order to achieve the same answer.

Use this quiz to see how the numbers in addition calculations can be added in different orders to achieve the same answer.

1.
What is 16 + 70 + 4?
90
80
78
87
Spotting the bond to 20 makes this calculation become much easier
2.
What is 12 + 13 + 11 + 10?
54
48
46
44
Adding together all the tens and then the units and combining the two totals is a useful way of solving this
3.
What is 3 + 22?
26
25
27
23
Starting at 3 and counting on 22 would take longer than swapping the order of the numbers around!
4.
What is 10 + 43 + 10 + 2
67
65
75
66
Counting up in tens from 43 and finally adding the 2 makes this calculation easy
5.
What is 2 + 14 + 18 + 6?
45
35
50
40
Recognizing that there are two pairs of bonds to 20 makes it much easier to solve this
6.
What is 1 + 35 + 34?
70
60
75
65
Adding the 1 to the 34 gives 35. 35 + 35 = 70
7.
What is 1 + 1 + 85 + 1 + 1?
89
88
86
98
Starting at 85 and counting on 4 is perfectly acceptable
8.
What is 2 + 30 + 8?
37
48
35
40
Adding the 2 and 8 first gives 10, which is easily added to 30
9.
What is 5 + 5 + 10 + 5 + 5
25
35
30
40
Starting at 10 and counting up in 5s, or adding up all the 5s and then 10 more are both good strategies
10.
What is 2 + 60 + 4?
75
67
56
66
Adding the smaller numbers first and then adding them to 60 is the best option
Author:  Angela Smith

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