Question

Lucy wants to divide 18.6 by 1.2. In order to estimate the quotient, which is the best expression to use?
10 divided by 1
10 divided by 2
20 divided by 1
20 divided by 2

Answer 1

To estimate the quotient of 18.6 divided by 1.2, we can round the numbers to make the calculation simpler.

- Rounding 18.6 to the nearest ten gives us approximately 20.
- Rounding 1.2 to the nearest whole number gives us approximately 1.

So, the best expression to use for estimation is:

**20 divided by 1.**

However, among the options you provided, "20 divided by 1" isn't explicitly listed, but comparing the alternatives:

- 10 divided by 1 = 10
- 10 divided by 2 = 5
- 20 divided by 1 = 20 (best estimate)
- 20 divided by 2 = 10

Given the choices, the best alternative for estimating 18.6 divided by 1.2 is:

**20 divided by 2** (which gives an estimate of 10).

So, if you need to select from the options, **20 divided by 2** would be the most reasonable choice.