Question

rachel and jack have marbles. use repeated reasoning circle tens to make 1 hundred. write the number three ways

Explanation:

Step1: Recall the concept of making 100 with tens

We know that 10 tens make 100. That is \(10\times10 = 100\).

Step2: Write the number 100 in different ways related to tens

First way: \(10 + 10+10+10+10+10+10+10+10+10=100\) (10 groups of 10).
Second way: \(5\times20 = 100\), and since \(20 = 2\times10\), we can think of it as 5 groups of 2 tens, which is still related to tens.
Third way: \(2\times50=100\), and \(50 = 5\times10\), so it's 2 groups of 5 tens.

Answer:

1. \(10 + 10+10+10+10+10+10+10+10+10 = 100\)
2. \(5\times(2\times10)=100\)
3. \(2\times(5\times10)=100\)