how do you write 2.78 in expanded form ?

(2*1)+(7/10)+(8/100)=2.78

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To write a decimal number like 2.78 in expanded form, you need to break it down by place value. Here's how you can do it step-by-step:

1. Identify the place value of each digit in the decimal number:
- The digit "2" is in the ones place (or units place).
- The digit "7" is in the tenths place.
- The digit "8" is in the hundredths place.

2. Write each digit in its respective place value:
- The digit "2" in the ones place is written as 2 × 1.
- The digit "7" in the tenths place is written as 7 × (1/10) or 0.7.
- The digit "8" in the hundredths place is written as 8 × (1/100) or 0.08.

3. Combine the expanded forms:
- Add the expanded forms together to get the complete expanded form of the decimal number.
- 2.78 in expanded form is written as 2 × 1 + 7 × (1/10) + 8 × (1/100).

This gives us the expanded form:
2.78 = 2 + 0.7 + 0.08