Practice the questions given in the worksheet on parentheses. Here we need to group the numbers by using parentheses and then add.
1. In the following number sentences first make 4s by using parentheses and then add.
(i) 2 + 2 + 1 = 5
(ii) 1 + 2 + 2 = 5
(iii) 3 + 1 + 6 = 10
2. In the following number sentences first make 6s by using parentheses and then add.
(i) 4 + 1 + 1 + 1 = 7
(ii) 8 + 2 + 4 = 14
(iii) 3 + 4 + 2 = 9
(iv) 3 + 3 + 2 = 8
(v) 3 + 2 + 2 + 2 = 9
3. Find the answers to make each number sentence true.
(i) (4  2) + 2 = ____
(ii) ____ + (3 + 4) = 8
(iii) (10  3)  1 = ____
(iv) (2 + 4) + (2 + 1) = ____
4. Use brackets to make each number sentence true.
(i) 10  6  2 = 2
(ii) 10  6 + 2 = 6
(iii) 9  5  1 = 3
(iv) 9  5 + 1 = 5
(v) 7  4  3 = 0
(vi) 7  4 + 3 = 6
Answers for the worksheet on parentheses are given below to check the exact answers of the above questions.
Answers:
1. (i) (2 + 2) + 1 = 5
(ii) 1 + (2 + 2) = 5
(iii) (3 + 1) + 6 = 10
2. (i) (4 + 1 + 1) + 1 = 7
(ii) 8 + (2 + 4) = 14
(iii) 3 + (4 + 2) = 9
(iv) (3 + 3) + 2 = 8
(v) 3 + (2 + 2 + 2) = 9
3. (i) 4
(ii) 1
(iii) 6
(iv) 9
4. (i) (10  6)  2 = 2
(ii) (10  6) + 2 = 6
(iii) (9  5)  1 = 3
(iv) (9  5) + 1 = 5
(v) (7  4)  3 = 0
(vi) (7  4) + 3 = 6
`2nd Grade Math Practice
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