Ten Trade Slides
Math Champions • Grade 2-3
Place Value • Addition
Master the Magic of Base Ten
The Ten Trade Rally
Learn how trading 10 ones for 1 ten makes two-digit addition easy, visual, and fast!
1
Add the Ones
Check if sum is 10+
2
Trade & Regroup
Send 1 Ten next door
3
Add All Tens
Include the new Ten!
!
The Golden Rule of Base Ten
Concept Discovery
The Ones Room
Maximum capacity: 9
The ones place can only fit single digits (0 through 9). As soon as you collect 10 ones, it is too crowded!
TRADE!
The Tens Tower
1 Ten Rod
Snap 10 individual ones together into 1 solid Ten Rod and march it over to the Tens column!
Key Rule: 10 Ones = 1 Ten. When ones total 10 or more, trade!
Model
Seeing It with Blocks: 28 + 15
28 + 15 = ?
Step 1: Build Numbers
Set out the Tens and Ones for both numbers:
28:
2 Tens + 8 Ones
15:
1 Ten + 5 Ones
Start by looking at the ones cubes first!
Step 2: Combine Ones
8 ones + 5 ones = 13 ones
13 is too big for ones!
Take 10 ones • trade for 1 Ten
Leaves 3 ones behind!
13 ones = 1 Ten + 3 Ones
Step 3: Count Total
Count all the tens, then the ones left:
Old Tens: 2 + 1 = 3
+ Traded Ten: + 1
Total Tens: 4 Tens (40)
4 Tens + 3 Ones = 43
Visualizing with blocks makes the math clear before writing the numbers!
Algorithm
Writing It Vertically: Step-by-Step
Standard Method
TENS
ONES
1
2
8
1
5
4
3
1
Add the Ones First
8 + 5 = 13. 13 has 3 ones and 1 ten.
→ Write 3 in the ones spot. Carry the 1 ten to the top!
2
Add All Tens Together
Don't forget the carried ten on top! Add: 1 + 2 + 1 = 4.
→ Write 4 in the tens column. Final answer: 43!
Always ask yourself: "Did my ones make 10 or more?" If yes, regroup! If no, just add down.
Worked Example
Let's Solve Together: 47 + 36
Practice Together
Phase A • Ones Step 1
Add 7 + 6
7 ones plus 6 ones equals 13 ones.
Carried Ten
[ 1 ]
→
Ones Column
3
Action: Put 3 below the line, put 1 in the tens box above 4.
Phase B • Tens Step 2
Add 1 + 4 + 3
Add the 1 carried ten plus 4 tens plus 3 tens:
1 + 4 + 3 = 8
Write 8 in the tens spot!
Result: 47 + 36 = 83
Great mathematicians always double check: 40 + 30 = 70, and 7 + 6 = 13. Then 70 + 13 = 83!
Class Challenge
Your Turn to Coach! 56 + 28
Turn & Talk
Solve This Problem
TENS ONES
[ ? ]
5 6
+ 2 8
? ?
Q1
Check the Ones:
What is 6 + 8? Will we need to regroup into a Ten?
Q2
Trade the Ten:
Which number stays in the ones column, and which number gets carried?
Q3
Finish the Tens:
What is the final sum when you add 1 + 5 + 2?
Ready to check your thinking?
6 + 8 = 14 • Final Sum: 84
Ten Trade Practice Worksheet
Base Ten Math Workshop
Ten Trade Practice Worksheet
Adding 2-digit numbers by trading 10 ones for 1 ten
Name:
Date: Score: /10
! Regrouping Rule:
1. Add Ones • 2. If 10 or more → trade & carry 1 ten • 3. Add all Tens
Part 1
Guided Practice • Follow the Frames
Add ones first, write the carried ten in the box above!
- T O
3 7
+ 2 5
Ones: 7 + 5 =
Tens: 1 + 3 + 2 =
- T O
4 8
+ 1 6
Ones: 8 + 6 =
Tens: 1 + 4 + 1 =
- T O
5 4
+ 2 9
Ones: 4 + 9 =
Tens: 1 + 5 + 2 =
Part 2
Independent Practice • Regroup & Solve
Write the carried ten in the top box when regrouping.
- T O
6 8
+ 1 7
- T O
2 6
+ 4 8
- T O
3 9
+ 3 4
- T O
5 7
+ 2 6
- T O
4 5
+ 3 8
- T O
1 8
+ 7 5
Part 3
Real-World Problem & Math Reasoning
10. Leo had 48 trading cards in his binder. For his birthday, his grandmother gave him a pack of 27 new cards. How many cards does Leo have now?
Answer: Leo has trading cards in all.
Explain your math thinking:
Why did you need to trade ones for a ten in this problem?
Set Up & Solve
Show all work above
Ten Trade Rally • Grade 2-3 Addition with Regrouping Page 1 of 1
