Related Facts
Are these related facts?
11-3=
11+ 3=
4 + 3 + 2 =
9
Is the answer odd?
15 - 8=
true
7
what is count back?
counting backwards, taking away 1 each time
what is fact family?
a group of numbers that go together to make different number sentences
What are the related facts?
5-2=3
2+3=5
5-3=2
3+2=5
7 + 6 + 1=
14
Is the answer even?
14 - 7 =
false
7
what is missing addends?
a number that is missing from an addition number sentence
what is subtract?
taking something away
Are these related facts?
20-6=
20-14=
true
8 + 3 +5 =
16
Is 13 a double?
13 - 8 =
False
5
what does difference mean?
the amount between two numbers
what is a related fact?
number sentences that use the same numbers
There are two ways to write 3+4 = 7. Are the number sentences related facts?
true
15 + 5 + 5=
25
Is the answer even?
11 - 6 =
False
5
what is a double fact?
math
How do you find the difference?
use subtraction
Can you call fact families related facts?
tue
7 + 7 + 7 =
21
Can you share 18 equally between 2 friends?
18 - 9 =
yes! 9+9=18
How do you use a number line to add?
start at the first number and count forward
How do you use a number line to subtract?
start at the biggest number and count back