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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
: 4+9+5
18
11
19
13
Q 2
: 5+(6+4)
19
9
17
15
Q 3
: 1+8+4
14
11
13
16
Q 4
: 2+9+6
19
17
11
14
Q 5
: (2+3)+9
14
17
11
19
Q 6
: 3+(4+5)
17
12
18
11
Q 7
: 7+8+5
13
20
18
10
Q 8
: 8+9(+7)+4
11
28
14
13
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Question 10: This question is available to subscribers only!
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