In this lesson, we will learn how to estimate the result of the subtraction of two two-digit numbers.
Q1:
Estimate the result of 78−34 by rounding to the nearest ten.
Q2:
Joud wants to estimate the difference between 56 and 41. She says: “If we round both numbers to the nearest 10, the estimated difference is 20”. Is Joud’s statement true or false?
Q3:
A student wants to estimate the result of 53−39 by rounding the numbers to the nearest ten. Which number line represents the correct way to round these numbers?
Use this rounding to estimate the result of 53−39.
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