STUDENT SHEET

Dividing by 10, 100, and 1,000

Grade 5 · Lesson 3 · Dimensions 5A p.12
Math Book 5 · sheet 3
Warm-up — yesterday: Multiplying by 10, 100, and 1,000
Show 74 × 100.

What we are learning

Dividing by ten moves every digit one place to the RIGHT — the same chart, the other direction.

How it is done — keep this beside you

These steps stay on your page while you work. If you get stuck, find the step you are on and read it again before you put your hand up.

1
4,200 in the chart.
| 4 | 2 | 0 | 0 |
2
Divide by ten: everything shifts one place right.
| 4 | 2 | 0 | 0 | 420
3
The zero on the end was holding a place that is no longer needed.
| 4 | 2 | 0 | 0 | 420 420
4
Divide by ten again.
| 4 | 2 | 0 | 0 | 420 420 42
5
So ÷ 100 is two shifts right.
| 4 | 2 | 0 | 0 | 420 420 42 4,200 ÷ 100 = 42

Practice

I DOteacher builds it, nothing erased
3,600 ÷ 100
  1. Two shifts right.
  2. 36
WE DO 1together, on whiteboards
85,000 ÷ 1,000
Three shifts. Boards up when every digit has landed.
WE DO 2together, on whiteboards
9,040 ÷ 10
There is a zero inside this number, not just on the end.
YOU DOindependent, from the book
Book 5A p.12 — the Do section, clipped onto the slide
the book page
Ask yourself: “Which direction, and how many places?”