Question

Travis writer 72=9x8. Is he correct ? Explain at least two strategies Travis to check his work

Answer 1

Since, Travis writes
`9 * 8 = 72`.

Yes, he is correct.

We will use two strategies to check Travis work.

First strategy:

We will divide '72' by '9'.

Since,
`72 / 9 = 8`

So, the expression which Travis wrote as
`72 = 9 * 8` is correct.

Second strategy:

We will add '9' eight times.

`9+9+9+9+9+9+9+9 = 72`

Therefore,
`9 * 8 = 72`

So, the expression
`72= 9 * 8` is correct.