Subtraction
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Automaticity subtraction to 20 without crossing tens
Automaticity subtraction to 20 without crossing tens
Subtraction to 1,000 without crossing tens or hundreds
Subtraction to 1,000 without crossing tens or hundreds
Subtraction to 1,000 using standard algorithm with regrouping 
Subtraction to 1,000 using standard algorithm with regrouping
Estimated and exact difference with decimal numbers with 3 decimal places
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 and 2 decimal places
Estimated and exact difference with decimal numbers with 1 or 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
Determine difference between decimal numbers with 1, 2, and 3 decimals
Subtraction with decimal numbers with 1,2, and 3 decimal places 
Subtraction with decimal numbers with 1,2, and 3 decimal places
Determine the difference between decimal numbers with 3 decimal places
Determine the difference between decimal numbers with 3 decimal places
Subtraction with 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 and 2 decimals
Determine difference between decimal numbers with 1 or 2 decimals places
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 and 2 decimal places
Subtraction with decimal numbers with 1 or 2 decimal places
Subtraction with decimal numbers with 1 or 2 decimal places
Subtraction to 1,000 splitting the subtrahend with regrouping
Subtraction to 1,000 splitting the subtrahend with regrouping
Subtraction through 100 regrouping hundreds as tens
Subtraction through 100 regrouping hundreds as tens
Subtraction to 100 regrouping 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
Subtraction to 100 by splitting the subtrahend with subtrahends < 10
Subtraction to 100 by splitting the subtrahend with subtrahends < 10
Subtraction to 100 by creating an addition problem
Subtraction to 100 by creating an addition problem
Subtraction from tens numbers with small differences
Subtraction from tens numbers with small differences
Subtraction to 50 without crossing ten with subtrahends <10
Subtraction to 50 without crossing ten with subtrahends <10
Subtraction to 20 with one more or one less, decomposing the second number
Subtraction to 20 with one more or one less, decomposing the second number
Subtraction to 20 using grouping with three numbers
Subtraction to 20 using grouping with three numbers
Subtraction to 20 on the number line, crossing ten
