Subtraction is taking away one group from a bigger group. When you subtract you are finding how many are left. You can subtract by counting how many are left. You can also subtract by counting back.

**To better understand subtraction…**

## LET’S BREAK IT DOWN!

### Count to find how many cars in all.

Counting tells you how many you have in all. There are toy cars on a table. Say one number for each car. 1, 2, 3, 4, 5, 6, 7, 8, 9, 10. There are 10 cars on the table.

### Count how many baby chicks are left.

There are baby chicks in a nest. Count the chicks to see how many in all. 1, 2, 3, 4, 5. There are 5 chicks in all. Sasha takes 1 chick out of the nest. How many chicks are left? 1, 2, 3, 4. There are 4 chicks left.

### Use “–” and “=” to show subtraction.

A “–” shows a group being taken away from another group. 5 – 1 = 4. The “–” shows that 1 chick was taken away from a group of 5. The “=” shows that 5 takeaway 1 is equal to 4. There are 4 chicks left.

### Use fingers to subtract donuts.

You made 8 donuts. Your family at 3. How many donuts are left? Show 8 with your fingers. Put 3 fingers down. Count how many fingers you still have up:1, 2, 3, 4, 5. There are 5 donuts left. 8 – 3 = 5.

### Count back to subtract balloons.

There were 10 balloons. Then 3 balloons popped. How many balloons are left? Start at 10. Count back 3: 9, 8, 7. There are 7 balloons left. 10 – 3 = 7.

## INTRO TO SUBTRACTION VOCABULARY

## INTRO TO SUBTRACTION DISCUSSION QUESTIONS

### What does subtraction mean?

### How can you use counters to show subtraction?

### Look at the number sentence 6 – 4 = 2. What does the – mean? What does the 2 mean?

### There are 4 balls in a bin. 1 is taken out. How many balls are left in the bin?

### How do you know what number to take away?

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