Virginia SOL Math / Kindergarten / Computation & Estimation

K.CE.1

Adding and Subtracting to 10

What you'll learn

  • Join groups to add within 10
  • Take away from a group to subtract within 10
  • Solve simple story problems within 10

Words to know

Add —
put groups together
Subtract —
take some away
Plus (+) —
the sign for adding
Minus (-) —
the sign for taking away
In all —
the total after adding

Why it matters Adding and subtracting helps us know how many toys we have after getting more, or how many snacks are left after we eat some.

Worked examples

Model ItI do

Add: 3 + 2.

Start with 3 counters, then bring in 2 more. Count them all: 1, 2, 3, 4, 5. So 3 + 2 = 5.

Try It TogetherWe do

You have 6 balloons. 2 pop. How many are left?

Start with 6 balloons and take away 2. Count what is left: 6 minus 2 leaves 4 balloons.

Now YouYou do

There are 4 birds. 3 more birds come. How many birds in all?

Add the two groups of birds together. Check your answer in the back of this chapter.

Practice

Mastered 0 of 11

Warm-up

Ease in with the basics.

  1. 1.Add: 1 + 2.

  2. 2.You have 3 blocks. 1 more block is added. How many blocks in all?

  3. 3.Subtract: 4 - 2.

On Level

The core Quick Check from the book.

  1. 1.Add: 2 + 5.

  2. 2.Subtract: 8 - 3.

  3. 3.You have 5 grapes and eat 1. How many are left?

  4. 4.Add: 4 + 4.

  5. 5.There are 7 ducks. 2 swim away. How many are left?

Challenge

Stretch your thinking.

  1. 1.You have 6 stickers. A friend gives you 4 more. How many stickers do you have in all?

  2. 2.There are 10 balloons. 7 pop. How many balloons are left?

  3. 3.You have 5 red apples and 4 green apples. How many apples in all?