Chapter 12 : Subtraction : Two-Digit Numbers
Essential Question: How can you subtract tens from two-digit numbers?
Lessons :
12-1 Mental Math: Find 10 Less
12-2 Subtract Tens
12-3 Think Addition to Subtract Tens
12-4 Subtract Multiples of Ten from Two-Digit Numbers
Math Vocabulary :
10 less
tens
difference
count back