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Intro to Subtraction
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 We’ll learn that subtraction is taking away from a group of things.
 We'll also learn how to solve subtraction problems with numbers up to 10!
 And we'll explore how this knowledge can help us have a party, take care of animals, and even eat donuts!

Discussion Questions

Before VideoHow can you use counters to show adding?ANSWER

I can show the first number with counters, and then show the second number with counters. To find how many in all I can count all the counters.

2 + 5 = 7 . There are 7 ducks in all.

I can start at 4. Then I count on 5 numbers. 5, 6, 7, 8, 9. I counted 5 more numbers. The last number I said was 9. 4 and 5 are 9.

I can count on my fingers. 1, 2, 3, 4, 5. 1 + 4 = 5.

The + means I am adding 3 and 2. The = means 3 plus 2 is equal to 5.


After VideoWhat does subtraction mean?ANSWER

Subtraction means to take away. When I subtract 3 from 5, I take away 3 from 5.
ANSWER
I can use counters to show how many there are to start. Then I can take away counters to show how many I subtract. Then I can count the amount that is left. Or I can count back from the start number as I take away the number of counters to subtract.

The – means that 4 is taken away from 6. The 2 means that there are 2 left over. 6 take away 4 is 2.

4 – 1 = 3. There are 3 balls left.

I always take away the smaller (lesser) number. The words in the problem tell me what number is there to start and what is taken away.



Vocabulary

Add
DEFINE
To put together. If you add 3 and 2, you find how many there are in all.

Subtraction
DEFINE
To take away. If you take away 2 from 3, you find how many are left after 2 are taken away from 3.

Count on
DEFINE
To count in increasing counting order. 1, 2, 3, 4, 5, 6, …

Count back
DEFINE
To count in decreasing counting order. 9, 8, 7, 6, 5, …

Greater
DEFINE
A number is greater than another number if you count it second when counting.

Lesser
DEFINE
A number is less than another number if you count it first when counting.

Add
DEFINE

Reading Material
Download as PDF Download PDF View as Separate PageWHAT IS SUBTRACTION?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…
WHAT IS SUBTRACTION?. 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 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.
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 “–” 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.
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.
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. 
Practice Word Problems

Practice Number Problems

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