Tens Town Slides
Level 1 Math The Reteaching Series
Tens-Town Construction Co.
Tens Town Builders
Let's master 2-digit addition using the ultimate building secret: The 10-Ones Trade-In!
Visual Reteach
Base-Ten Models
Press space or click arrow keys to build →
The Golden Rule of Tens Town
Town Code: 10-1
NO DOUBLE DIGITS IN ONE COLUMN!
Each lane in our town is narrow. It can only hold single-digit citizens (0, 1, 2, 3, 4, 5, 6, 7, 8, or 9).
If the Ones Lane has 10 or more block citizens...
WE MUST TRADE THEM FOR 1 TENS ROD!
The Trade-In Value
Trade
10 separate Ones cubes
become 1 solid Tens rod!
Unit: 2-Digit Addition with Regrouping Slide 2 of 7
1 Step 1: Draw the Numbers
Problem: 28 + 15
First, Draw 28
Draw 2 Tens (lines or rods) and 8 Ones (dots or cubes).
Next, Draw 15 Below
Draw 1 Ten and 5 Ones right below it.
TENS (RODS)
ONES (CUBES)
(2 Tens)
(8 Ones)
(1 Ten)
(5 Ones)
Unit: 2-Digit Addition with Regrouping Slide 3 of 7
2 Step 2: Combine & Count Ones
Problem: 28 + 15
Always Start with Ones!
Let's count all of our tiny ones cubes together. We had 8 ones, and we added 5 more.
ONONES OVERFLOW!
We have 13 ones cubes in the Ones lane. That breaks our Golden Rule!
TENS
ONES
1
2
3
4
5
6
7
8
9
10
11
12
13
13 Ones cubes! Danger!
Unit: 2-Digit Addition with Regrouping Slide 4 of 7
3 Step 3: Trade & Regroup!
Problem: 28 + 15
How to Trade:
- Circle exactly 10 ones cubes.
- Convert them into 1 brand new Tens Rod.
- Carry that new rod over to the Tens Lane at the top!
Look at what is left: Only 3 ones cubes remain in the Ones lane! 3 is less than 10, so it's perfectly safe!
TENS
ONES
+1 Carried Ten
Traded 10 Ones
3 Ones Left Behind
Unit: 2-Digit Addition with Regrouping Slide 5 of 7
4 Step 4: Record the Totals!
Problem: 28 + 15
Standard Written Form
1
28
+15
43
Write the 3 under the Ones, and carry the 1 over to the Tens. Then add 1 + 2 + 1 = 4 Tens!
We Finished the Build!
Our math blueprint is perfectly balanced! Let's tally the blocks we ended with:
4 TENS rods (originally 2 + 1, plus 1 carried over)
3 ONES cubes left over after the 10-cube trade
Our Final Masterpiece: 28 + 15 = 43!
Unit: 2-Digit Addition with Regrouping Slide 6 of 7
On-The-Job Practice Challenge!
Your Turn!
Let's solve this blueprint together:
37 + 26 = ?
1
Draw Blocks
Draw 3 tens 7 ones and 2 tens 6 ones on your workspace chart.
2
Trade 10 Ones
Circle 10 ones cubes. Trade them for a shiny new Tens rod!
3
Write the Answer
Count the remaining ones. Count all standard and extra tens rods. Record the final sum!
Ready to build with your practice worksheet!
Slide 7 of 7
Tens Town Worksheet
Official Math Blueprint
Tens Town Construction Co.
Topic: 2-Digit Addition with Regrouping (Draw & Trade)
Contractor Name:
Date of Build:
The Blueprint Guide (Worked Example: 28 + 15)
1. Draw: Draw tens & ones.
2. Combine: Put ones together.
3. Trade: Circle 10 ones. Trade for 1 ten rod.
4. Tally: Add and record sum!
TENS (RODS) ONES (CUBES)
+1 Ten
COACHED BUILDS: Let's draw, trade, and solve together!
BUILD #1 Solve: 36 + 18
TENS ONES
Extra Ten
Ten
36
+18
Trade 10 ones?
Yes No
BUILD #2 Solve: 45 + 27
TENS ONES
Extra Ten
Ten
45
+27
Trade 10 ones?
Yes No
Tens-Town Construction Co. Page 1 of 2
Independent Build Assignment
On-Your-Own Masterpiece
Level: Master Builder
Mission: Draw your own tens rods and ones cubes in the place value charts below. Watch out for columns with 10 or more ones! Circle them, do the trade-in, and record your numbers on the plans.
BUILD #3 Solve: 54 + 19
TENS ONES
Extra Ten
Ten
54
+19
Trade 10 ones?
Yes No
BUILD #4 Solve: 28 + 38
TENS ONES
Extra Ten
Ten
28
+38
Trade 10 ones?
Yes No
Official Inspector Self-Checklist
- I drew the exact Tens & Ones for both numbers in the chart first.
- If I counted 10 or more ones, I circled them and traded them for 1 extra ten.
- I remembered to write the extra 1 ten at the top of the Tens column.
Inspector Stamp
Tens-Town Construction Co. Page 2 of 2
Tens Town Exit Ticket
Final Inspection
Tens Town Construction Co.
Exit Ticket: Master Build Test
Builder Name:
Date:
Your Task: Draw and solve the blueprint problem: 47 + 24 = ______
TENS (RODS) ONES (CUBES)
Extra Ten
Ten
47
+24
Builder's Reflection:
Did you need to trade 10 ones for 1 ten? Explain why or why not below:
CUT HERE TO SEPARATE BLUEPRINTS
Final Inspection
Tens Town Construction Co.
Exit Ticket: Master Build Test
Builder Name:
Date:
Your Task: Draw and solve the blueprint problem: 47 + 24 = ______
TENS (RODS) ONES (CUBES)
Extra Ten
Ten
47
+24
Builder's Reflection:
Did you need to trade 10 ones for 1 ten? Explain why or why not below:
Tens Town Build Off Game
Cooperative Math Station
Tens Town Build-Off!
A 2-Player Game of Blocks, Trades, and Sums
The Construction Route
START
ZONE 1 25 + 16
ZONE 2 37 + 14
TRADE STN Explain 10 Ones
ZONE 4 29 + 23
ZONE 3 45 + 18
ZONE 5 16 + 28
WET CEMENT Go back 1
ZONE 6 39 + 39
FINISHED BUILD
ZONE 8 48 + 27
ZONE 7 54 + 27
Materials needed: 1 standard die (or spinner), 2 student game pieces (counters or dry-erase caps), and base-ten blocks (or use the drawing mats on the right).
How To Play
- Take turns rolling the die and moving your game piece along the route.
- When you land on a Zone, BOTH players must solve the problem!
- Use the mini place value mats below to draw base-ten rods and cubes.
- If you need to trade 10 ones for 1 ten, tell your partner: "Trading 10 ones!"
- Check each other's answers. If correct, stay! If wrong, slide back 1 space!
PLAYER 1 WORKSPACE Site A
TENS ONES
PLAYER 2 WORKSPACE Site B
TENS ONES
Contractor Team Pledge:
"We agree to check each other's blueprint trades and build together!"
P1 Sign:
P2 Sign:
Tens-Town Construction Co. Math Centers Edition
