Master two-digit subtraction without regrouping through interactive activities, visual models, and real-world scenarios like grocery shopping and inventory management.
Practice subtraction with real shopping scenarios: 'The store has 46 apples, customers buy 23 apples. How many apples are left?'
Students work through grocery store scenarios where they subtract items purchased from the total inventory.
Number Line Method: Start at 46, jump back 20 to 26, then jump back 3 to 23. Compare with vertical subtraction.
Complete 10 grocery store subtraction problems using both number line and vertical methods.
Use base-ten blocks and drawings to visualize subtraction without regrouping, comparing different representation methods.
Students use base-ten blocks to model subtraction problems and see the relationship between visual and numerical methods.
Base-Ten Blocks: Show 46 as 4 tens and 6 ones, remove 23 (2 tens and 3 ones), count remaining blocks.
Model 5 subtraction problems using base-ten blocks and record the numerical process.
Master the number line method for two-digit subtraction, learning to break down problems into manageable jumps.
Students practice using number lines to solve subtraction problems, learning to make efficient jumps.
Number Line Strategy: Start at the larger number, make jumps of tens first, then ones.
Solve 8 subtraction problems using number lines, showing all jumps clearly.
Practice the standard vertical subtraction algorithm with two-digit numbers that don't require regrouping.
Students practice the standard vertical subtraction method with problems that don't require borrowing.
Vertical Method: Align numbers by place value, subtract ones first, then tens.
Complete 12 vertical subtraction problems, checking answers with number line method.
Apply subtraction skills to solve word problems involving two-digit numbers without regrouping.
Students read and solve word problems that require two-digit subtraction without regrouping.
Problem-Solving Steps: Read, identify numbers, choose method, solve, check answer.
Solve 6 word problems, showing work and explaining the solution process.
Explore the relationship between addition and subtraction through fact families with two-digit numbers.
Students discover how addition and subtraction are related through fact family exploration.
Fact Family Method: Given 46 - 23 = 23, find related facts: 23 + 23 = 46, 46 - 23 = 23.
Create fact families for 5 different subtraction problems and verify all related facts.