Which expression is equivalent to the given equation?
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Which expression is equivalent to the given equation?
To solve this problem, we need to determine which expression is equivalent to . The sum equals . We will rewrite as the sum of two numbers that add to 5, matching one of the provided choices.
Let's decompose in potential ways: . Now let's rewrite the equation using this decomposition:
This step has shown that equals , the same result as .
Therefore, the expression equivalent to is , corresponding to choice 2.
If we have 67 blocks in total, how many blocks will remain if we remove 5 tens and 4 ones?
The two numbers must add up to exactly 5! For example, 1+3=4 (not 5) and 3+3=6 (not 5). Only combinations like 2+3 or 1+4 work because they equal 5.
Look at the answer choices given! You need to find which decomposition matches one of the options. In this case, only 2+3=5 appears as an answer choice.
It means both expressions give the same final answer. Since and , they're equivalent!
You could, but it's much easier to decompose the smaller number! Breaking down 5 into 2+3 is simpler than breaking 48 into something like 46+2.
Not necessarily! You can find equivalent expressions by recognizing that if the parts equal the whole, the expressions are equivalent without calculating the final sum.
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