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Grade 3 - Mathematics
5.1 Mental Addition

Method:
  1. Add the expression within parentheses first.
  2. Add the result to the third number.

Example: (5+4)+3
  1. Add 5 and 4. The result is 9.
  2. Add 3 and 9.
Answer:12
Directions: Find the sum of the following. Also write at least ten examples of your own.
Q 1: 5+(6+4)
17
9
19
15

 Q 2: (1+3)+5
8
9
10
11

Q 3: 1+(6+9)
12
16
13
15

 Q 4: 2+4+6
14
12
15
18

Q 5: 8+2+7
11
17
13
15

 Q 6: 1+8+4
14
13
16
11

Q 7: (2+3)+9
17
19
11
14

 Q 8: 8+9(+7)+4
13
28
14
11

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 Question 10: This question is available to subscribers only!


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