Represent Subtraction
There are 9 frogs. The 2 frogs hop away.
How many frogs are there now?
There are 7 frogs now.
Viktoria makes 7 picture frames. She gives 2 to her friend. How many picture frames does she have now?
How can counting help you solve the problem?
She has 5 picture frames now.
8 children sit at tables.
5 children sit at a red table.
The rest sit at a blue table.
How many children sit at the blue table?
How can you count on to solve the problem?
3 children sit at the blue table.
Elena has 7 apples. Ian has 2 apples.
Elena gives 4 of her apples to Ian.
How can you show the number of apples each child has now?
7-4=3
Elena has 3 apples
2+4=6
Ian has 6 apples
There are 10 fish in a group. Then 4 fish swim away.
How many fish are there now?
There are 6 fish now
Dina has 9 balloons. Then 1 balloon floats away. How many balloons does she have now?
Show how you can count back.
Dina has 8 balloons now.
There are 9 acorns. 7 acorns are on the ground. The rest of them are in a tree. How many acorns are in the tree?
9-7=2
2 acorns in the tree
Helena has 8 oranges. 5 are in a bag. The rest are in a bowl. How many oranges are in a bowl? How can you show the problem as addition?
5+3=8
8-5=3
There are 3 oranges in the bowl.
12 children are at the beach. 5 children leave. How many children are at the beach now?
Write an equation.
12-5=7
Use a number line to count back to subtract.
8-3=__?
8-3=5
Ann has 7 flowers. 4 are in a vase. She holds the rest. How can you count on to find how many flowers Ann holds?
7-4=3
So, Ann holds 3 flowers
Vito has 12 seashells.
5 are big. The rest are small.
How many small seashells does he have?
12-5=__
5+__=12
So, 12-5=__.
__small seashells
5+7=12
12-5=7
7 small seashells
12 seagulls are on the beach. 8 seagulls fly away. How many seagulls are on the beach now?
Write an equation.
12-8=4
How can you count back to subtract 7-2?
Draw or write an explanation.
I'll check. The answer is 5.
Haldi has 11 beads. 9 of them are on the floor. The rest are on the table. How many beads are on the table?
11-9=2
2 beads on the table.
What is 10-8?
8+__=10
So, 10-8=__.
8+2=10
So, 10-8=2
Sue has 8 books. She gives some away. How many books could she have now?
8-___=___
Count back to subtract. What is the difference?
Show your work.
12-3=__?
12-3=9
Explain how Malik can count on to subtract 10-7.
He can start at 7 and count on until he gets to 10. The difference is 3 because he counts 3 numbers to go from 7 to 10.
Jo has 12 boxes. 6 are closed. The rest of them are open. How many boxes are open?
__+__=___
So, ___-___=___
___boxes are open
6+6=12
So, 12-6=6
6 boxes are open.