If we have 85 blocks in total, how many blocks will remain if we remove 4 tens and 1 one?
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If we have 85 blocks in total, how many blocks will remain if we remove 4 tens and 1 one?
To solve this problem, we begin by calculating the total number of blocks to remove.
Step 1: Calculate the blocks in 4 tens.
Step 2: Calculate the total blocks to remove by combining tens and ones.
Step 3: Subtract the total removed blocks from the initial total to determine how many blocks remain.
Therefore, the number of blocks remaining is .
Add fifty units to the number 31.
What is the resulting number?
Because the problem asks how many total blocks remain, not tens and ones separately. Converting helps you work with the same unit throughout: .
In base-ten blocks, a 'ten' is a long block representing 10 unit blocks. You can see this in the diagram where the long rectangles represent tens and small squares represent ones.
No! That would give you 41, which is wrong. You must convert everything to the same unit first. We're removing a total of 41 blocks, not working with separate place values.
Count the blocks in the original diagram: 8 ten-blocks plus 5 one-blocks = 85 total. After removing 4 tens and 1 one, you should have 44 blocks remaining.
Regular subtraction like gives the same answer, but this problem helps you visualize place value using concrete blocks. It's the same math, just shown differently!
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