Write fact families for the numbers in 30 and 31.how are the fact families different
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To write fact families for a given set of numbers, you need to identify the related addition and subtraction equations.
Let's start with the number 30:
- Addition: 10 + 20 = 30
- Subtraction: 30 - 20 = 10
- Addition: 15 + 15 = 30
- Subtraction: 30 - 15 = 15
Now let's move on to the number 31:
- Addition: 11 + 20 = 31
- Subtraction: 31 - 20 = 11
- Addition: 16 + 15 = 31
- Subtraction: 31 - 15 = 16
The fact families for the number 30 are 10 + 20 = 30 and 30 - 20 = 10, and also 15 + 15 = 30 and 30 - 15 = 15.
The fact families for the number 31 are 11 + 20 = 31 and 31 - 20 = 11, and also 16 + 15 = 31 and 31 - 15 = 16.
The fact families are different because each set of numbers involves different addition and subtraction equations.
no
For 30 --
1, 30, 2, 15, 3, 10, 5, 6
For 31 --
1, 31
How are they different?