Solve the exercise:
=65:13
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Solve the exercise:
=65:13
In order to simplify the resolution process, we begin by breaking down the number 65 into a smaller addition exercise.
We choose numbers that are divisible by 13:
We then divide each of the terms within parentheses by 13:
To finish we add up all of the results that we obtained:
5
\( 140-70= \)
The decomposition method makes division easier by using numbers you already know! When you see 26 ÷ 13 = 2 and 13 ÷ 13 = 1, the math becomes much simpler than trying to divide 65 ÷ 13 in your head.
Look for multiples of 13 that add up to 65! Think: 13 × 1 = 13, 13 × 2 = 26. Since 26 + 26 + 13 = 65, these work perfectly because each part divides evenly by 13.
Start with easy multiples of your divisor! For 65 ÷ 13, try: 13 × 5 = 65. This means you can write it as , then divide each 13 by 13 to get 1 + 1 + 1 + 1 + 1 = 5.
It depends on the numbers! This method is great for mental math when you can quickly spot multiples. For bigger numbers or when multiples aren't obvious, long division might be more efficient.
Yes, but they must all be divisible by 13! You could use 39 + 26 (since 39 = 13 × 3), but avoid combinations like 32 + 33 because these don't divide evenly by 13.
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