Fox Adds Fast!

Fox sees ducks at the pond. Can you help Fox add and subtract fast?

1st Grade Math

Step 1: Make Ten

Fox sees 8 ducks. Then 6 more come. See the box of 8. It needs some more to make ten.

8 + ? = 10

8 + 2 = 10. We take the 2 from the 6. Ten helps us add fast!

We gave 2 to the 8. That made a full ten. So 4 are left.

10 + 4 = ?

10 + 4 = 14. So 8 + 6 = 14! The sum is 14.

Make Ten to Add

          Step 1: See the big one.

          Step 2: Make it ten.

          Step 3: Then add what is left.

8 + 6 = 8 + 2 + 4 = 10 + 4 = 14

9

10

11

12

13

14

Fox has 13 nuts. He eats 4. We must subtract. First take 3 to get to 10. Then take 1 more.

13 - 4 = ?

13 - 3 = 10. Then 10 - 1 = 9. So 13 - 4 = 9!

One Family, Four Facts

          8 + 4 = 12   and   4 + 8 = 12

          12 - 4 = 8   and   12 - 8 = 4

A fact family helps you. If you can add it, you can subtract it!

7 + 5 = ?

Tip: 7 needs 3 to make ten.

7 + 3 = 10. Then 10 + 2 = 12. So 7 + 5 = 12!

Kit has 9 shells. Then Sam hands Kit 6 more. How many shells in all?

9 + 1 = 10. Then 10 + 5 = 15. So 9 + 6 = 15 shells!

6 + ? = 13

Tip: Use the fact family! 13 - 6 tells you.

6 + 7 = 13. To find it, subtract: 13 - 6 = 7.

Fox knows his doubles: 7 + 7 = 14. 8 is just one more than 7.

7 + 8 = ?

7 + 7 = 14, and one more is 15. Doubles plus one!

When do you add things at home? Tell a pal or a grown-up!

Fox says: Make ten. Use doubles. Use the fact family. Then math is fast and fun!

Great Work!

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correct

add subtract sum fact family doubles