Question

which expression is equivalent to 36 + 47? 40 + 43 now the problem is easier to solve. 36 + 47 = 40 + 43 key idea how can i make an addition problem easier to solve in my head? i can make a problem easier to solve by? apart an addend first to get to the next?.

Explanation:

Step1: Analyze the addition problem

We have \(36 + 47\) and we want to find an equivalent expression. Let's check the given option \(40+43\). First, calculate \(36 + 47\): \(36+47 = 83\). Then calculate \(40 + 43\): \(40+43=83\). So they are equal.

Step2: Determine the method

To make the addition easier, we can "break" (or "take") apart an addend first to get to the next "ten" (since we adjusted 36 to 40, which is a multiple of ten). For example, from 36, we take 4 to make it 40, and then we subtract that 4 from 47, making it 43. So the first blank should be "taking" (or "breaking") and the second blank should be "ten". But for the equivalent expression part, we saw that \(36 + 47=40 + 43\) because both equal 83.

Answer:

For the equivalent expression, \(40 + 43\) is equivalent to \(36 + 47\) (since \(36+47 = 83\) and \(40 + 43=83\)). For the key idea blanks: the first dropdown should be "taking" (or similar like "breaking") and the second dropdown should be "ten".