In math addition fact sums to 13 we need to find the two numbers that add to thirteen. There are many combinations of numbers that add to 13 (thirteen).
Suppose Clara’s sister gave her 7 candies how many candies Clara need more to make 13 candies? Clara needs 6 more candies to make 13. Since, 7 + 6 =13.
From the above table write the number to make the sum 13:
0 + 13 = 13
1 + 12 = 13
2 + 11 = 13
3 + 10 = 13
4 + 9 = 13
5 + 8 = 13
6 + 7 = 13
Related addition fact sums to 13:
7 + 6 = 13
8 + 5 = 13
9 + 4 = 13
10 + 3 = 13
11 + 2 = 13
12 + 1 = 13
13 + 0 = 13
Worked-out examples to find the addition fact sums to 13:
1. Add: 9 + 4 = ?
Count the numbers up to add.
Start counting after 9 and count up 4:
10, 11, 12, 13
9 + 4 = 13
The sum of 9 + 4 is 13.
2. Find the missing addend whose addition fact sums to 13:
(i) 13 = 11 + ?
Start counting the numbers after 11 to make it equal to 13
12, 13
Count the numbers now, there are 2 numbers.
13 = 11 + 2
(ii) 13 = 4 + ?
Start counting the numbers after 4 to make it equal to 13
5, 6, 7, 8, 9, 10, 11, 12, 13
Count the numbers now, there are 9 numbers.
13 = 4 + 9
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