Question

solve. (3 tens 9 ones ) × 100 = 39 hundreds 39 × 10 × 10 = 39 × 100 = 3,900

Explanation:

Step1: Identify the number

The number is 3 tens and 9 ones, which is $3\times10 + 9\times1=39$.

Step2: Multiply by 100

We need to find $39\times100$.
According to the rule of multiplying by 100, we add two - zeros at the end of 39. So $39\times100 = 3900$.

Answer:

3900