Addition within 5 represents joining two nonnegative whole-number quantities or increasing a quantity, with addends and sums from 0 through 5, and connects concrete quantities, dot or ten-frame arrangements, number-line jumps, and equations such as 2 + 3 = 5. The understanding includes part–whole relationships, counting on, zero as an additive identity, and the fact that reversing addends preserves the sum; larger sums, multi-digit procedures, and generalized algebraic treatment are outside this scope.
Addition means putting two groups together to find how many there are in all.
Let’s solve:
Show the first number.
Make a group of dots:
● ●
Add the second number.
Add more dots:
● ● + ● ● ●
Count all the dots.
Count: .
Write the sum.
There are dots in all, so:
You can also count on from : say three more numbers—. The answer is still .
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