Mathematics
Grade5
Easy
Question
Mark wants to estimate the product of 293 and 724. Find the best way? to do? so?
- 200 × 700
- 300 × 600
- 300 × 700
- 300 × 800
Hint:
The estimate value are round up or down value of the actual value. The actual product is hard to do mentally and it takes time but when we take compatible number for estimation is easy to calculate mentally and saves time. Here Mark wants estimate product 293 x 724.
The correct answer is: 300 × 700
Here we need to find the estimated product of 293 x 724.
Since ,the actual product of 293 x 724 is,
293 x 724 = 212132
And it mentally hard to calculate the we are going to estimate this product and find the compatible numbers,
Now
293 → 300 , here the 293 is rounded up to 300 .
And,
724→700 , here 724 rounded down to 700 ,
Both number are compatible now the product of these numbers are,
300 x 700
Therefore, the estimated product of 293 x 724 is 300 x 700 , which is mentally easy to calculate.
The answer is 300 x 700 (option (c)).
The estimated product is the rounded product of actual product. Just find the compatible number and rounded up or down and the product is like mentally easy to solve. Apply same methods in similar questions.
