Subtraction with numbers up to 20

Estimate the difference to 100,000

Subtraction to 100,000 with simple numbers

Subtracting from a ten-thousands number

Subtraction to 10,000 without regrouping

Subtraction to 10,000 with simple numbers

Subtracting from a thousands number

Subtraction through 1,000

Automaticity subtraction to 100

Automaticity subtraction to 20 crossing tens

Automaticity subtraction to 20 without crossing tens

Automaticity subtraction to 10

Subtraction to 1,000 crossing tens and hundreds

Subtraction to 1,000 crossing hundreds

Subtraction to 1,000 crossing tens

Subtraction to 1,000 crossing multiples of ten

Subtraction to 1,000 from a multiple of 100

Subtraction to 1,000 without crossing tens or hundreds

Subtraction to 1,000 with multiples of ten

Subtraction to 1,000 using standard algorithm with regrouping

Subtraction to 1,000 using standard algorithm

Estimated and exact difference with decimal numbers with 3 decimal places

Estimated and exact difference with decimal numbers with 1 and 2 decimal places

Estimated and exact difference with decimal numbers with 1 or 2 decimal places

Determine difference between decimal numbers with 1, 2, and 3 decimals

Subtraction with decimal numbers with 1,2, and 3 decimal places

Determine the difference between decimal numbers with 3 decimal places

Subtraction with decimal numbers with 3 decimal places

Determine difference between decimal numbers with 1 and 2 decimals

Determine difference between decimal numbers with 1 or 2 decimals places

Subtraction with decimal numbers with 1 and 2 decimal places

Subtraction with decimal numbers with 1 or 2 decimal places

Estimate the difference to 1,000

Estimate the difference to 100

Subtraction to 1,000 with three or more numbers

Subtraction to 1,000 via compensation method

Subtraction to 1,000 via one more/one less

Subtraction to 1,000 via simplification

Subtraction to 1,000 splitting the subtrahend with regrouping

Subtraction to 1,000 from hundreds numbers

Determine difference to 1,000

Subtraction to 1,000 splitting the subtrahend

Subtracting numbers to a hundreds number

Subtraction through 100 regrouping tens

Subtraction through 100 regrouping hundreds as tens

Subtraction through 100 using tens

Subtraction to 1,000 with the zero-rule

Subtraction to 100 with three or more numbers

Subtraction to 100 via compensation method

Subtraction to 100 via one more/one less

Subtraction to 100 via simplification

Subtraction to 100 with subtrahends >10

Subtraction to 100 regrouping with subtrahends <10

Subtraction to 100 by splitting the subtrahend with subtrahends >10

Subtraction to 100 by splitting the subtrahend with subtrahends < 10

Determining difference to 100

Subtraction to 100 by creating an addition problem

Subtracting numbers to 100 from a tens number

Subtraction from tens numbers with small differences

Subtraction to 100 by tens and ones

Subtracting numbers to 100 to a tens number

Subtracting numbers to 100 using tens

Subtraction to 100 via the zero rule

Subtraction to 50 with subtrahends >10

Subtraction to 50 with subtrahends <10

Subtraction to 50 with subtrahends >10

Subtraction to 50 without crossing ten with subtrahends <10

Subtraction to 30 using simplification

Subtraction to 30 with regrouping

Subtraction to 30 without regrouping

Subtraction to 20 with three or more numbers

Subtraction to 20 with one more or one less

Subtraction to 20 via inverse operation

Subtraction to 20 crossing ten

Subtraction to 20 with one more or one less, decomposing the second number

Subtraction to 20 using grouping with three numbers

Subtraction to 20 on the number line, crossing ten

On the bus: Subtraction to 20 crossing ten

Subtraction from 20 with numbers to 20

Subtracting tens and ones from numbers to 20

Subtraction to 20 with result of 0 or 1

Determining difference to 20

Subtraction to 20 using simplification

Subtraction to 20 without regrouping

Subtraction to 20 on the number line

On the bus: Subtraction to 20

Recognizing subtraction problems to 20

Subtraction to 10 with three numbers

Subtraction to 10 via inverse operation

Subtraction to 10 using related problems

Subtraction to 10 with one more or one less

Subtraction to 10 on the number line

Subtraction from 10 with numbers to 10

Subtraction to 10 with result of 0 or 1

Subtraction to 10 with 1 or 2

Subtraction to 10 with rekenrek

Recognizing subtraction problems to 10

Subtraction to 10 via bus example

Recognizing subtraction problems to 5