Weekly number challenge

Today’s Number:

715

Write it in words

seven hundred and fifteen

Write it as an expanded number

700+10+5

Add 3

718

Add 20

735

Subtract 5

710

Double it

1430

Half of it

362.5                                   

Multiply by 3

2145

The easiest part was add 3

The hardest part was multiply  by 3

I need to work on double it