Question

stimation and SubtractionJill watched 72 minutes of a movie that is 149 minuteslong. How much of the movie is left?What is the estimated number of minutes left if bothnumbers are rounded to the tens place?Click or use the arrow keys to select a box in the grid.Then, type a number in that box.is the actual number of minutes left?607080Reset

Answer 1

80 minutes

Explanation

Step 1

to solve this we need to do a subtraction

time left= total movie -minutes he watched

then

replace

$\begin{gathered} \text{time left=149 minutes -72 minutes} \\ \text{time left=}77\text{ minutes} \end{gathered}$

so, the answer is 77 minutes

Step 2

What is the estimated number of minutes left if both numbers are rounded to the tens place?

hence, we need to round the numbers and then do the subtraction

$\begin{gathered} 149\rightarrow rounded\rightarrow150 \\ 72\text{ rounded}\rightarrow70 \end{gathered}$

so

$\begin{gathered} \text{time left=}150-70 \\ \text{time left=}80 \end{gathered}$

so, the answer is 80

I hope this helps you