If we have 27 blocks and we remove 7 blocks , how many blocks will remain?
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If we have 27 blocks and we remove 7 blocks , how many blocks will remain?
To solve this problem, we'll follow these steps:
Now, let's perform the calculation:
Step 3: We calculate .
Therefore, the number of blocks remaining after removing 7 blocks from 27 is .
If we have 67 blocks in total, how many blocks will remain if we remove 5 tens and 4 ones?
Look for key words! Words like 'remove', 'take away', 'subtract', or 'how many remain' mean subtraction. Words like 'add', 'combine', or 'total' mean addition.
Absolutely! Start with all 10 fingers representing some blocks, then use counting strategies. For bigger numbers like 27, try counting backwards from 27: count down 7 numbers.
Break it down! You can think of 27 as 20 + 7. Remove 7 from the 7, leaving just 20. Or count backwards slowly: 27, 26, 25, 24, 23, 22, 21, 20.
Use addition to check subtraction! If 27 - 7 = 20, then 20 + 7 should equal 27. This is called the inverse operation check.
Visual models help you see the math! The blocks represent the 27 items, and you can imagine removing 7 of them. This makes abstract numbers more concrete and easier to understand.
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