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Two- and Three-Digit Subtraction
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Subtract Ones from a Multiple of 10
Subtract from multiples of 10
Take from the final tower of 10, then combine the leftover ones with the other tens.
Subtract in Parts: Tens, Then Ones
Take away the tens part, then the ones part
Use base-ten pieces to subtract a two-digit number in parts, recording the amount left after each step.
Subtract in Parts on a Number Line
Choose each part and jump back
Choose how to break apart the number being subtracted and watch every jump on the number line.
Two-Digit Subtraction Without Regrouping
Subtract tens and ones without trading
Use tens towers and loose ones to subtract by place when every place has enough to take away.
Two-Digit Subtraction With Regrouping
Regroup a ten in every problem
Use tens towers and loose ones to regroup one ten before subtracting in every problem.
Two-Digit Subtraction With and Without Regrouping
Take from the 1s or a 10
Use tens towers and loose ones to subtract two-digit numbers one place at a time.
Three-Digit Subtraction Without Regrouping
Subtract hundreds, tens, and ones without trading
Use hundreds, tens, and ones models to subtract three-digit numbers without regrouping.
Three-Digit Subtraction With Regrouping
Regroup ones, tens, or both
Practice three-digit subtraction problems that always require regrouping in at least one place.
Three-Digit Subtraction With and Without Regrouping
Regroup hundreds, tens, and ones
Use bundles of ten towers, single towers, and loose ones to subtract three-digit numbers one place at a time.