Colton caught 18 worms by the stream and 11 worms in the forest. If he lets 9 of them go, how many worms will he have left?
38
20
23
29
$6.25
$6.12
$6.07
$6.15
12
9
15
7
3 + 5 & 3 × 5
5 + 5 & 2 × 5
5 + 10 & 2 × 5
2 + 5 & 2 × 5
Write the standard form of the number six hundred thirty-seven.