Practice the problems of Math in Focus Grade 1 Workbook Answer Key Chapter 8 Practice 3 Ways to Add to score better marks in the exam.

Example
What is double 1?

Double 1 means to add 1 more to 1.
1 + 1 = 2

Question 1.
What is double 2?

Double 2 means to add ___ more to 2.
___ + ___ = ____
Double 2 means to add 2 more to 2.
2 + 2 = 4

Question 2.
What is double 3?

Double 3 means to add ___ more to 3.
____ + ___ = ___
Double 3 means to add 3 more to 3.
3 + 3 = 6

Question 3.
4 + 4 = ____

Question 4.
5 + 5 = ____

Question 5.
a. 3 + 3 = ____
3 + 4 = ____
3 + 3 = 6
3 + 4 = 7

b. 3 + 3 is double ____
3 + 4 is double ____ plus ____
3 + 3 is double 6
3 + 4 is double 6 plus 1

Complete the number bonds. Then fill in the blanks.

Example

Question 6.

Question 7.

Use doubles facts to complete the addition sentences.

Example

Question 8.

Answer: 0 + 0 = 0

Question 9.

Answer: 6 + 6 = 12

Question 10.

Answer: 5 + 5 = 10

Question 11.

Answer: 8 + 8 = 16

Question 12.

Answer: 9 + 9 = 18

Question 13.

Answer: 10 + 10 = 20

Add the doubles-plus one numbers. Use doubles facts to help you. Then write the doubles fact you used.

Example
5 + 6 = 11
Doubles fact: 5 + 5 = 10

Question 14.
7 + 6 = ____
Doubles fact: ___ + ____ = _____
7 + 6 = 13
Doubles fact: 6 + 6 = 12

Question 15.
7 + 8 = ____
Doubles fact: ___ + ____
7 + 8 = 15
Doubles fact: 7 + 7 = 14

Question 16.
9 + 10 = ____
Doubles fact: ___ + ____