Final answer:
Zeros are annexed to align place values in the addition problems 2), 3), and 4). To align place values in addition problems, you can annex zeros to the right of numbers as needed. Let's go through the options:
Step-by-step explanation:
To align place values in addition, you need to annex zeros. Let's go through the given options:
- 0.54 + 12.1 - No zeros are annexed in this addition.
- 2.55 + 145.05 - Zeros are annexed in this addition to align the place values. The correct addition problem is 2.55 + 145.05.
- 25.59 + 1.2 - Zeros are annexed in this addition to align the place values. The correct addition problem is 25.59 + 1.20.
- 23.04 + 124.1 + 34.06 - Zeros are annexed in this addition to align the place values. The correct addition problem is 23.04 + 124.10 + 34.06.
- 1.51 + 3.07 + 4.18 - No zeros are annexed in this addition.
Therefore, the addition problems where zeros are annexed to align place values are 2), 3), and 4).
To align place values in addition problems, you can annex zeros to the right of numbers as needed. Let's go through the options:
1) \(0.54 + 12.1\):
- In this case, we need to annex a zero to the right of the decimal in 0.54 to align it with the tenths place in 12.1.
2) \(2.55 + 145.05\):
- All the numbers already have the same number of decimal places, so no annexing of zeros is needed in this case.
3) \(25.59 + 1.2\):
- We need to annex a zero to the right of the decimal in 1.2 to align it with the hundredths place in 25.59.
4) \(23.04 + 124.1 + 34.06\):
- All numbers already have the same number of decimal places, so no annexing of zeros is needed in this case.
5) \(1.51 + 3.07 + 4.18\):
- All numbers already have the same number of decimal places, so no annexing of zeros is needed in this case.
So, the addition problems where you annex zeros to align place values are:
1) \(0.54 + 12.1\)
3) \(25.59 + 1.2\)
These are the options that fit the criteria mentioned.