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Want to learn more about Problem Strings? Check out the links below.

 

 Addition


 

Connecting Addition to Subtraction
Over
Give and Take
Give and Take
Get to a Friendly Number
Get to a Friendly Number
Over
Over
Get to a Friendly Number
Swapping
Swapping
Building Number

 

Subtraction


 

Difference vs. Removal
Remove to a Friendly Number
Over
Remove to Friendly Number Over
Connecting Addition to Subtraction
Over
Removal vs. Difference
Constant Difference
Over
Over

 

Multiplication


 

Double and Halve
Over
Using Quarters
Double and Halve
Over
Over
Using Quarters
Multiply to Divide
Over
Over and Adjust
Click to Watch Live
Five is Half of Ten
Over

 

Division


 

Over and Under
Remainders
9's Divisibility Relationships
Smart Partial Quotients
Partial Quotient

 

Ratio and Proportion, Percents, Fractions


 

Scaling Fractions
Fraction Multiplication
Reasoning about Percents
Fractions as Operators
Inverse Variation
Over
Data Centers
Adding Fractions

 

Geometry 


 

Quadrilaterals
Quadrilaterals
Cool Patterns
Triangles
Congruent Angles
Rectangles

Want more of these? 

Check out my books Building Powerful Numeracy and Lessons and Activities for Building Powerful Numeracy