Question

Show a way to count from 170 to 410 using tens and hundreds. circle at least 1 benchmark number

Answer 1

In order to reach from 170 to 410, we have to take 2 jumps of 100 and 4 jumps of 10.

Explanation:

We have to count from 170 to 410.

We can only use tens and hundreds to do so.

First, we take a jump of 100.

170 + 100 = 270

We, again take a jump of 100.

270 + 100 = 370

We, again take a jump of 100.

370 + 100 = 470

But, we need to reach 410 which is way behind on the number line. Thus, after reaching 370 we cannot take a jump of 100.

Thus, 370 can be considered as a benchmark number.

After 370, we take jumps of 10 only.

370 + 10 = 380

380 + 10 = 390

390 + 10 = 400

400 + 10 = 410

Thus, we have reached the required number.

So, in order to reach from 170 to 410, we have to take 2 jumps of 100 and 4 jumps of 10.

Answer 2

Benchmark are numbers that are used as standards to which the rest of the data is compared to. When counting numbers using a number line, the benchmark numbers are the intervals written on the axis. For benchmark numbers of 10, the number line on top of the attached picture is shown. Starting from 170, the tick marks are added by 10, such that the next numbers are 180, 190, 200, and so on and so forth. When you want to find 410, just find the benchmark number 410.

The same applies to benchmark numbers in intervals of 100. If you want to find 170, used the benchmark numbers 100 and 200. Then, you estimate at which point represents 170. For 410, you base on the benchmark numbers 400 and 500.