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Grade 3 - Mathematics
5.1 Mental Addition
Method:
Add the expression within parentheses first.
Add the result to the third number.
Example
: (5+4)+3
Add 5 and 4. The result is 9.
Add 3 and 9.
Answer:12
Directions:
Find the sum of the following. Also write at least ten examples of your own.
Q 1
: 2+9+6
11
17
19
14
Q 2
: 1+(6+9)
12
15
16
13
Q 3
: 3+5+8
11
17
13
16
Q 4
: (1+3)+5
11
9
8
10
Q 5
: 3+(4+5)
18
11
12
17
Q 6
: (3+4)+8
18
14
12
15
Q 7
: 8+2+7
15
11
17
13
Q 8
: 1+8+4
14
13
11
16
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Question 10: This question is available to subscribers only!
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