Fill in the blank!

Question

Estimating Products
Estimate the product of 115 x 9.
Round the factors.
115 -> _
9 -> 10
Multiply the first digits.
1 x 1 = _
There are three zeros in the factors, so we place three zeros at the end of the prodect.
1,000

Answer 1

Let's fill in the blanks step by step:

1. Round the factors:

   • 115 rounds to 120
   • 9 rounds to 10

2. Multiply the rounded factors:

   • Multiply the first digits:
   • 1 x 1 = 1

3. Count the zeros:
   There are one zero from 120 and one zero from 10, which gives us a total of two zeros.

4. Combine them:

   • Therefore, 1 followed by two zeros equals 1,000.

So, the final answer with the filled blanks is:

• 115 -> 120
• 9 -> 10
• Multiply the first digits: 1 x 1 = 1
• The final estimate of the product is 1,200.