Question

Estimate the sum and difference to the nearest thousand: $8457$ and $4573$ .

Accepted Answer

Given: $8457$ and $4573$

Actual sum of both numbers is

$8457 + 4573$

$8$ $4$ $5$ $7$

$+$ $4$ $5$ $7$ $3$

$1$ $3$ $0$ $3$ $0$

Therefore,

Actual sum is $13030$ .

The nearest value of $8457$ $= 8000$ (estimated to the nearest thousand)

Nearest value of $4573$ $=$ $5000$ (estimated to the nearest thousand)

To calculate the sum of two numbers we have to perform addition operation for these numbers

$8000 + 5000 = 13000$

So the estimated sum is $13000$ .

Actual difference between the numbers is

$8$ $4$ $5$ $7$

$-$ $4$ $5$ $7$ $3$

$3$ $8$ $8$ $4$

Thus, actual difference is $3884$ .

To calculate the difference between these two numbers we need to perform subtraction operation considering their values estimated to the nearest thousand.

$8000 - 5000 = 3000$

So, the estimate difference is $3000$ .

Hence, the required answers are $13000$ and $3000$ .

Tamil Nadu Board Solutions for Chapter: Numbers, Exercise 12: Try these

Tamil Nadu Board Mathematics Solutions for Exercise - Tamil Nadu Board Solutions for Chapter: Numbers, Exercise 12: Try these

Questions from Tamil Nadu Board Solutions for Chapter: Numbers, Exercise 12: Try these with Hints & Solutions

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