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Online Quiz (Worksheet A B C D)

Questions Per Quiz = 2 4 6 8 10


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)
19
17
15
9

Q 2: 3+5+8
17
16
13
11

Q 3: 7+8+5
10
18
20
13

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

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

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

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

Q 8: 3+(4+5)
17
18
11
12

Question 9: This question is available to subscribers only!

Question 10: This question is available to subscribers only!


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