Question

approximate answer for each of the following calculations also, find the actual sum 279+395​

Answer 1

Answer:

Full SiteNavigation

Estimating a Sum

Custom Search

We will learn the basic knowledge for estimating a sum. Here we will learn an easy way to estimate a sum of two numbers by rounding.

In case of two digit numbers we can only round the number to the nearest tens place i.e. only one place estimate.

For example, let us estimate the following sums:

(i) 47 + 32

We need to round the number to the nearest 10.

47 → 50

32 → 30

50 + 30 = 80

(ii) 25 + 34

We need to round the number to the nearest 10.

25 → 30

34 → 30

30 + 30 = 60

(iii) 75 + 13

We need to round the number to the nearest 10.

75 → 80

13 → 10

80 + 10 = 90

1. Estimate the sums of 72 and 48

Solution:

We round the number to the nearest 10.

72 → 70

48 → 50

So, 72 is nearest to 70 and 48 is nearest to 50

70 + 50 = 120

Thus the estimated sum = 120

Answer 2

Answer:

actual sum of 279 +395 =674

approximately 279+395=

670 to the nearest ten

700 to the nearest hundred

hope this is helpful to you and please mark as brainliest answer