Run sheet

Multiplying by 10, 100, and 1,000

Grade 5 · Lesson 2 · 23 slides · blocked practice

The big idea

Multiplying by ten moves every digit one place to the LEFT. The zero that appears is a consequence, not the rule.

Slide by slide

#On the screenWhat you say
1Today — WARM-UPPoint at the five parts. Name where we are.
2What is the value of the 8 in 380,000,000?Boards up on three. This is yesterday's work — Numbers to One Billion. Do not help each other; I need to see what each of you kept.
380,000,000 answer — own slideShow me. Everyone at once. Check your own board against this.
4Today — I DOWe are at I DO. Boards down and flat.
5Multiplying by ten moves every digit one place to the LEFT. The zero that appears is a consequence, not the rule.Read this out. Do not explain it yet — the example explains it.
6| 3 | 6 | build 1 of 536 in a place-value chart.
7| 3 | 6 |
| 3 | 6 | _ | build 2 of 5
Times ten: every digit shifts one place left.
8| 3 | 6 |
| 3 | 6 | _ |
360 build 3 of 5
The ones place is now empty, so a 0 holds it.
9| 3 | 6 |
| 3 | 6 | _ |
360
3,600 build 4 of 5
Times ten again — shift again.
10| 3 | 6 |
| 3 | 6 | _ |
360
3,600
36 × 100 = 3,600 build 5 of 5
So × 100 is two shifts. Not 'add two zeros' — SHIFT twice.
1147 × 100Now the same thing on a new one. Watch — nothing on your boards.
12Two shifts left.
4 and 7 move; two places open up.
4,700 answer — own slide
I say every step aloud as I write it. The board keeps all of it.
13Today — WE DOWe are at WE DO. Boards up.
14512 × 10One shift. Say where each digit lands. Boards up.
155,120 answer — own slideBoards up. Everyone at once — check yours against this.
1680 × 1,000This one already ends in a zero. Shift anyway.
17Three shifts.
80,000 answer — own slide
Boards up. Everyone at once — check yours against this.
18Today — YOU DOWe are at YOU DO. Boards down, books open.
19Dimensions 5A — page 8Open your books to this page. Wait — do not start yet.
20Do — page 8These are the book's own problems, same type as the three we have just done. Work them in the book.
21Today — CLOSURELast part. Answers up.
22“How many places is everything moving?”This is the question to ask yourself every time, not just today.
23Show 63 × 100 on your board.One last board. Then we are finished.

Mini whiteboards, by segment

SegmentMWBTimeBoardsWhat to hold
WARM-UPretrieval3-5 minBOARDS UPQuestion up, boards up on the count. Everyone shows at once — a child who waits to see a neighbour's board has not retrieved anything.
I DOnone — they watch3-4 minboards downBoards DOWN and flat. This segment is watching, and a child writing is not watching. Say so once at the start of the year and then hold it.
WE DOprimary use5-6 minBOARDS UPOne step, then boards up. Do not let them run ahead to the answer — the point is that everybody is on the same step at the same time.
YOU DOon the sheet4-5 minboards downBoards down. This is the book's problems, worked where the work will be kept.
CLOSUREanswers displayed2-3 minboards downAnswers on the board, children check their own. Mark nothing here.
Watch for
'Add zeros' works here and fails the moment decimals arrive in this same chapter — 0.8 × 10 is not 0.80. Teach the shift now and the decimal lesson costs nothing later.