Estimate the product: 9 × 223 =?

The correct answer is: 10 × 200 = 2000

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 9 × 223.
9 × 223
{9 is rounded up to 10, 223 is rounded down to 200}
One number is rounded up and the other is rounded down. Here 9 is rounded up to the nearest tens, i. e., 10 while 223 is rounded down to the nearest hundred, i. e.,200
10 × 200
= 2000
The estimated product of 9 × 223 is 2000.
Or, In short way,
Step1: 9 rounds to 10.
Step2: 223 rounds to 200.
Step3: Find 10 × 200.
We know that 1 × 2 =2
Step4: Add 3 zeros to get the estimated product.
10 × 200 =2,000.