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 find which expression is equivalent to the equation .
Let's first compute the sum:
Next, let's look at the given answer choices and determine which expression results in :
Choice 1:
Therefore, the equivalent expression to is .
If we have 67 blocks in total, how many blocks will remain if we remove 5 tens and 4 ones?
Changing numbers can make mental math easier! For example, 20+30 is simpler to calculate than 19+30, so we substitute and adjust.
If you increase a number, you must subtract the same amount somewhere else. If 19 becomes 20 (+1), you must subtract 1 to keep the expression equal.
Yes! But be careful to balance your changes. If you change 19 to 20 (+1) and 30 to 29 (-1), the total stays the same.
Double-check your substitution! Make sure you're adding and subtracting the right amounts. The original , so your equivalent expression must also equal 49.
Absolutely! You could write , , or many others. As long as they equal 49, they're equivalent!
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