Understanding Plus 9 Facts

Why is it useful to compare plus 9 facts with plus 10 facts?

• Because 9 is equal to 10

• Because 9 is two less than 10

• Because 9 is one less than 10

• Because 9 is one more than 10

What is the result of 8 plus 10?

• 19

• 18

• 17

• 16

If 6 plus 10 equals 16, what is 6 plus 9?

• 17

• 15

• 16

• 14

What is the pattern observed when comparing plus 9 and plus 10 facts?

• Plus 9 is always two less than plus 10

• Plus 9 is always equal to plus 10

• Plus 9 is always one more than plus 10

• Plus 9 is always one less than plus 10

What is the result of 5 plus 9?

• 15

• 14

• 16

• 13

If 2 plus 10 equals 12, what is 2 plus 9?

• 10

• 11

• 12

• 13

What is the result of 7 plus 9?

• 16

• 18

• 15

• 17

If 9 plus 10 equals 19, what is 9 plus 9?

• 17

• 18

• 19

• 20

What is the result of 3 plus 9?

• 14

• 11

• 12

• 13

What should you do to better understand plus 9 facts?

• Ignore the pattern

• Practice plus 10 facts

• Practice plus 9 facts

• Memorize all numbers