Math Playground for Teachers
Complete the number puzzle using whole numbers.
The number in each block is the sum of the two numbers
directly below it.
Number Conundrum Whole Numbers - Learning Connections
Mental Math - practice number bonds and missing addends
Common Core Connection for Grades 1+
Apply properties of operations as strategies to add and subtract.
Add and subtract within 20, demonstrating fluency for addition and subtraction
Add within 100, including adding a two-digit number and a one-digit number.
Fluently add and subtract within 20 using mental
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