Let's break it down step by step to fill in the blanks.
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43 + 138: First, let's calculate the total.
- \( 3 + 8 = 11 \): This means that 3 ones plus 8 ones equals 11 ones.
- Trade in: 11 ones is the same as 1 ten and 1 one, so we would trade in for a tens piece.
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Now, we count the tens:
- You have 1 ten from the trading, plus 4 tens from 43 (which is 40) plus 3 tens from 138 (which is 30).
- Thus, \( 1 + 4 + 3 = 8 \): So, we have 8 tens.
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Finally, we look at the hundreds, tens, and ones:
- From the addition, we end up with 1 hundred, 8 tens, and 1 one, which means the final answer is 181.
So the filled in blanks are:
- 11 ones
- 10
- 8 tens
- 181