Chapter 6- Model Two-Digit Subtraction
6-1 Subtract Tens: I can use mental math and basic facts to subtract tens.
6-2 Count Back Tens and Ones: I can count back by tens and ones to subtract.
6-3 Regroup Tens as Ones: I can understand numbers with and without regrouping.
6-4 PSS: Write a Number Sentence: I can use write a number sentence as a strategy to solve problems.
6-5 Subtract One-Digit Numbers from Two-Digit Numbers: I can subtract one-digit numbers from two-digit numbers with and without regrouping.
6-6 Subtract Two-Digit Number: I can subtract two-digit numbers with and without regrouping.
6-7 Check Subtraction: I can check my subtraction by using addition.
6-8 PSS: Choose a Strategy: I can choose the best strategy to solve problems.
6-9 Estimate Differences: I can estimate differences by rounding to the nearest tens.