Question

Please explain . She added two decimal numbers that result in a sum of 76.23. What two addenda could she have used? Justify your solution?

Answer 1

The easiest way to do this would be to think of 2 addenda that would result in the number in EACH place value.

For example to get a 3 in the hundredths place, use a 1 and a 2.

To get a 2 in the tenths place, use a 1 and a 1.

To get a 6 in the ones place, use a 2 and a 4.

To get a 7 in the tens place, use a 3 and a 4.

You addends would be 32.11 and 44.12 using these numbers.

Answer 2

One possible answer is:

74.12 and 2.11.

Explanation:

There are many different addends we can use to get this answer.

If we start with 74.12, to find the second addend we would subtract:
76.23 - 74.12 = 2.11.
This would be the second addend.

We could use this same process for any possible addend we try for the first one; simply subtract from 76.23 to find the second addend.