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Fact Families
Basic
Vocabulary
Doubles
More Basic
100
What is the missing number?? 15-2=13 15-13=2 13+2=15 2+---=---
2+13=15
100
47+12=
47+12=59
100
What is the underlined thing called? 50+50 --- ---
An addened
100
18+18=
18+18=36
100
7+8=
7+8=15
200
What is a fact family????
A fact family is a group of numbers that go together.\
200
98+56=
98+56=154
200
What is the underlinded thing called? 50+50= ---
equal sign or the thing that goes before the answer
200
15+15=
15+15=30
200
15+10=
15+10=25
300
What are the 2 things a fact family need?
A fact family needs 2 operation signs.
300
567+40=
567+40=607
300
Explain what addition is
Addition is when you take 2 numbers and put them together
300
7+7=
7+7=14
300
98+23=
98+23=123
400
Answer all the following 27-14= 13+14= 14+13=
13 27 27
400
90+134=
90+134=224
400
How does addition help us in real life?
It helps us for taxes etc.
400
8+8=
8+8=16
400
10+10=
10+10=20
500
Give a whole fact family for the numbers below: 78 2 80
78+2=80 80-2=78 2+78=80
500
123+456=
123+456=579
500
What is the whole point of having the symbols?
The symbols are to seperate the numbers
500
32+32=
32+32=64
500
34+34=
34+34=68