Strategies for Multi-Digit
Addition and Subtraction
Sum Cloud Challenge
Identify the addends that make a particular sum. There are 6 levels of difficulty to choose from.
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Number Bonds 30
Identify addends that make a particular sum. Many versions of this game with different sums.
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Number Pyramid
Three levels to this game allowing for practice with one-, two-, and three-digit numbers.
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Addition to 100
Find the missing addend that makes a certain sum. Sums can be adjusted to any multiple of 10 from 20 through 100.
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Subtraction from 100
Find the missing part (subtrahend) when subtracting from a certain whole (minuend). Wholes can be adjusted to any multiple of 10 from 20 through 100.
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Number Conundrum
Use reasoning about sums and differences to complete a number pyramid. Can choose between numbers through 40 or numbers through 100.
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Making Change
Use coins and dollars to make change from a given dollar amount.
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Making Change
Use coins and dollars to make change from a given dollar amount.
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Number Bonds
Find an addend that will help make a particular sum.
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Post Sorting
Add one and two digit numbers. Adaptable to use sums up through 50.
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Addition Pyramid
Find sums to fill in a pyramid. Choose a level that uses one-digit or two-digit numbers.
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Count-On Convict
Use decomposing and counting up to friendly numbers to find the difference of two-digit numbers.
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