Question

Which is the estimate of 398 x 1.9?

Answer 1

Answer:

800

Step-by-step explanation:

When we say estimate, we must estimate the 2 numbers to their closest answer:

398- 400 when rounded to the nearest 100

1.9- 2 when rounded to the nearest whole number

So we get the estimate equation as: 400×2= 800

Answer 2

Solution:

We know that:

• $\tex\text{398 can be rounded to 400, as 398 is close to 400.}$
• $\tex\text{1.9 can be rounded to 2, as 1.9 is close to 2.}$

This means that:

• $398 \times 1.9$ ≈ $400 \times 2$

Simplifying "400 x 2"

• $400 \times 2$ $= 800$

Thus, the estimate of 398 x 1.9 is about 800.