<img src="https://d5nxst8fruw4z.cloudfront.net/atrk.gif?account=iA1Pi1a8Dy00ym" style="display:none" height="1" width="1" alt="" />

Find sums of multi-digit numbers.

Levels are CK-12's student achievement levels.
Basic Students matched to this level have a partial mastery of prerequisite knowledge and skills fundamental for proficient work.
At Grade (Proficient) Students matched to this level have demonstrated competency over challenging subject matter, including subject matter knowledge, application of such knowledge to real-world situations, and analytical skills appropriate to subject matter.
Advanced Students matched to this level are ready for material that requires superior performance and mastery.
• Video

by CK-12 //basic
Watch multiple visual ways to represent addition.
MEMORY METER
This indicates how strong in your memory this concept is
5
• Video

by CK-12 //basic
Provides an example of adding 3 whole numbers.
MEMORY METER
This indicates how strong in your memory this concept is
3
• Video

Addition (up to sum 10) - Overview

by CK-12 //basic
Overview
MEMORY METER
This indicates how strong in your memory this concept is
0
• Video

Addition (up to 20) - Overview

by CK-12 //basic
Overview
MEMORY METER
This indicates how strong in your memory this concept is
0
• Video

Addition (sum up to 100) - Overview

by CK-12 //basic
Overview
MEMORY METER
This indicates how strong in your memory this concept is
0
• Video

Word Problems: Addition (up to sum 100) - Overview

by CK-12 //basic
Overview
MEMORY METER
This indicates how strong in your memory this concept is
0
• Video

Mixed Operations (numbers to 100) - Overview

by CK-12 //basic
Overview
MEMORY METER
This indicates how strong in your memory this concept is
0
• Video

Word Problems: Adding/Subtracting 3 Numbers - Overview

by CK-12 //basic
Overview
MEMORY METER
This indicates how strong in your memory this concept is
1
• Video

by CK-12 //basic
Overview
MEMORY METER
This indicates how strong in your memory this concept is
0
• Video

Mixed Operations (numbers to 1000) - Overview

by CK-12 //basic
Overview
MEMORY METER
This indicates how strong in your memory this concept is
0
• Video

Addition (up to sum 10) - Example 1

by CK-12 //basic
Addition Sentences (up to sum 10)
MEMORY METER
This indicates how strong in your memory this concept is
0
• Video

Addition (up to sum 10) - Example 2

by CK-12 //basic
Adding by counting on (up to sum 10)
MEMORY METER
This indicates how strong in your memory this concept is
0
• Video

Addition (up to sum 10) - Example 3

by CK-12 //basic
Writing addition sentences (up to sum 10)
MEMORY METER
This indicates how strong in your memory this concept is
1
• Video

Addition (up to sum 10) - Example 4

by CK-12 //basic
Word problems-adding two numbers (up to sum 10)
MEMORY METER
This indicates how strong in your memory this concept is
0
• Video

Addition (up to 20) - Example 1

by CK-12 //basic
Addition pictures (up to sum 20)
MEMORY METER
This indicates how strong in your memory this concept is
0
• Video

Addition (up to 20) - Example 2

by CK-12 //basic
Adding using Tens and Ones
MEMORY METER
This indicates how strong in your memory this concept is
0
• Video

Addition (up to 20) - Example 3

by CK-12 //basic
Word problems: Addition with pictures (up to sum 20)
MEMORY METER
This indicates how strong in your memory this concept is
0
• Video

Addition (up to 20) - Example 4

by CK-12 //basic
Word problems (up to sum 20)
MEMORY METER
This indicates how strong in your memory this concept is
0
• Video

Addition (up to 20) - Example 5

by CK-12 //basic
Adding multiple one-digit numbers with pictures
MEMORY METER
This indicates how strong in your memory this concept is
1
• Video

Addition (up to 20) - Example 6

by CK-12 //basic
Word problems - adding multiple one-digit numbers
MEMORY METER
This indicates how strong in your memory this concept is
0
• Video

Addition (sum up to 100) - Example 1

by CK-12 //basic
Adding two-digit numbers without regrouping
MEMORY METER
This indicates how strong in your memory this concept is
0
• Video

Addition (sum up to 100) - Example 2

by CK-12 //basic
Adding two-digit numbers with regrouping
MEMORY METER
This indicates how strong in your memory this concept is
0
• Video

Addition (sum up to 100) - Example 3

by CK-12 //basic
Adding three 2-digit numbers
MEMORY METER
This indicates how strong in your memory this concept is
0
• Video

Addition (sum up to 100) - Example 4

by CK-12 //basic
Select the correct addition sentence (up to sum 100)
MEMORY METER
This indicates how strong in your memory this concept is
0
• Video

Addition (sum up to 100) - Example 5

by CK-12 //basic
Select the incorrect addition sentence (sum up to 100)
MEMORY METER
This indicates how strong in your memory this concept is
0
• Video

Addition (sum up to 100) - Example 6

by CK-12 //basic
Complete the addition sentence (sum up to 100)
MEMORY METER
This indicates how strong in your memory this concept is
0
• Video

Word Problems: Addition (up to sum 100) - Example 1

by CK-12 //basic
One-step word problems (up to sum 100)
MEMORY METER
This indicates how strong in your memory this concept is
0
• Video

Word Problems: Addition (up to sum 100) - Example 2

by CK-12 //basic
Two-step word problems (up to sum 100)
MEMORY METER
This indicates how strong in your memory this concept is
0
• Video

Mixed Operations (numbers to 100) - Example 1

by CK-12 //basic
Fill in the missing sign ( + or - ) (numbers to 100)
MEMORY METER
This indicates how strong in your memory this concept is
0
• Video

Mixed Operations (numbers to 100) - Example 2

by CK-12 //basic
Complete the subtraction sentence (numbers to 100)
MEMORY METER
This indicates how strong in your memory this concept is
0
• Video

Mixed Operations (numbers to 100) - Example 3

by CK-12 //basic
Fact family (numbers to 100)
MEMORY METER
This indicates how strong in your memory this concept is
0
• Video

Mixed Operations (numbers to 100) - Example 5

by CK-12 //basic
Addition and subtraction terms (numbers to 100)
MEMORY METER
This indicates how strong in your memory this concept is
0
• Video

Word Problems: Adding/Subtracting 3 Numbers - Example 1

by CK-12 //basic
Word Problems: Adding 3 Numbers
MEMORY METER
This indicates how strong in your memory this concept is
0
• Video

Word Problems: Adding/Subtracting 3 Numbers - Example 2

by CK-12 //basic
Word Problems: Subtracting 3 Numbers (same)
MEMORY METER
This indicates how strong in your memory this concept is
0
• Video

Addition - Example 3

by CK-12 //basic
Addition: Select the incorrect sentence (sum up to 1000)
MEMORY METER
This indicates how strong in your memory this concept is
0
• Video

Addition - Example 4

by CK-12 //basic
Addition: Complete the addition sentence (sum up to 1000)
MEMORY METER
This indicates how strong in your memory this concept is
0
• Video

Mixed Operations (numbers to 1000) - Example 1

by CK-12 //basic
Mixed Operations: Select the correct sentence (numbers to 1000)
MEMORY METER
This indicates how strong in your memory this concept is
0
• Video

Mixed Operations (numbers to 1000) - Example 2

by CK-12 //basic
Mixed Operations: Select the incorrect sentence (numbers to 1000)
MEMORY METER
This indicates how strong in your memory this concept is
1
• Video

Mixed Operations (numbers to 1000) - Example 3

by CK-12 //basic
Fill in the missing sign (+ or -) (numbers to 1000)
MEMORY METER
This indicates how strong in your memory this concept is
0
• Video

Mixed Operations (numbers to 1000) - Example 4

by CK-12 //basic
Fact family (numbers to 1000)
MEMORY METER
This indicates how strong in your memory this concept is
0
• Video

Mixed Operations (numbers to 1000) - Example 5

by CK-12 //basic
Addition and subtraction terms (numbers to 1000)
MEMORY METER
This indicates how strong in your memory this concept is
0
• Video

Mixed Operations (numbers to 1000) - Example 6

by CK-12 //basic
Balance the equations (numbers to 1000)
MEMORY METER
This indicates how strong in your memory this concept is
0
• Video

Mixed Operations (numbers to 1000) - Example 7

by CK-12 //basic
Challenge flow chart (numbers to 1000)
MEMORY METER
This indicates how strong in your memory this concept is
0
• Video

Addition - Example 2

by CK-12 //basic
Addition: Select the correct sentence
MEMORY METER
This indicates how strong in your memory this concept is
0
• Video

Addition - Example 1

by CK-12 //basic
MEMORY METER
This indicates how strong in your memory this concept is
0