Mathematics
Grade5
Easy
Question
Estimate to find the product of 63 × 89
- 3,600
- 4,800
- 6,300
- 5,400
Hint:
The estimate math definition is a quick guess that is close enough to work with but is not necessarily accurate. Estimating products by rounding numbers to the nearest ten, hundred, thousand etc., we know how to estimate the sum, difference, etc., to the nearest 10, 100, 1000, etc. Now we have to estimate the products.
The correct answer is: 5,400
To estimate the product, we first round off the multiplier and the multiplicand to the nearest tens, hundreds, or thousands and then multiply the rounded numbers.
Estimate the product: 63 × 89
63 × 89
{89 is rounded up to 90, 63 is rounded down to 60}
One number is rounded up and the other is rounded down. Here 89 is rounded up to the nearest tens, i. e., 400 while 63 is rounded down to the nearest tens, i. e., 60.
60 × 90
= 5400
The best way to estimated product of 60 × 90 = 5400
Or,
Step1:63 rounds to 60.
Step2:89 rounds to 90.
Step3: Find 60 × 90.
We know that 6 × 9 =54
Step4: Add 2 zeros to get the estimated product.
60 × 90 =5,400.
Estimating products help us to check the reasonableness of an answer.
