A place value tells how much a digit is worth based on its position. When you are given place-value parts, your job is to combine them into one whole number.
Read each value carefully and decide what place it belongs to:
For example, 300 means 3 hundreds, 40 means 4 tens, and 7 means 7 ones.
Add the values from left to right by place. If the parts are 300, 40, and 7, combine them as:
If a place is missing, it means that place has 0. For example, 500 + 6 = 506.
Make sure the digits line up with their places. Do not add the digits separately unless they belong to the same place-value parts.
Read the number back in expanded form and see if it matches the given parts. For 347, the expanded form is 300 + 40 + 7, so the answer is correct.
A good check is to ask: “Does each digit match its place?”
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