Adding and Subtracting zero
8-0=
8
4+__=5
4+1
3
1+1=
2
3-1=
2
0+3=
3
What is the switch partner for 4+1
1+4
1+ ___=10
9
5+5=
10
4-1=
3
0+5=
5
Take a look at this list of 5 partners. Which set of partners is missing?
4+1
3+2
1+4
2+3
What is the switch partner for 4+6?
6+4
3+3=
6
5+1=
Solve the story problem. 6 children are playing at the playground. None of them leave. How many children are still at the playground?
6-0=6
Answers vary
Choose a set of 10 partners and tell a story.
Answers vary
A spider is a good example of what double?
4+4
7+2
9
What is the rule for adding and subtracting zero?
The number does not change because you are not adding anything or subtracting anything.
Does 5 have any doubles partners? Why or Why not?
No, only even number totals have double partners.
Does 10 have any doubles partners? Why or Why not?
5+5 because 10 is an even total and all even totals have a doubles partner.
Does the number 11 have a double?
No, 11 is an odd number.
I am thinking of a number. The numbers are partners of 7. One number is 1 more than the other number. What numbers am I thinking of?
4 and 3