Multiply by 10, 100, and 1,000

Each digit moves one place left for every × 10.

Warm-up, learn, try it together, practice, then a quick check. About 15 minutes.

What children learn in Level 25

Each place is worth 10 times the place to its right. So when you multiply by 10, each digit moves one place to the left!
The 3 tens become 3 hundreds, and the 6 ones become 6 tens. The ones place is empty, so it gets a 0.
Times 100 is times 10, then times 10 again: each digit moves two places. Times 1,000 moves each digit three places.
So the 4 in 4,000 is worth 10 times as much as the 4 in 400!

Georgia's K-12 Mathematics Standards:

4.NR.1.2 — Recognize and show that a digit in one place has a value ten times greater than what it represents in the place to its right and extend this understanding to determine the value of a digit when it is shifted to the left or right, based on the relationship between multiplication and division.
4.NR.2.3 — Solve relevant problems involving multiplication of a number with up to four digits by a 1-digit whole number or involving multiplication of two two-digit numbers using strategies based on place value and the properties of operations. Illustrate and explain the calculation by using equations, rectangular arrays, and/or area models.