Mastering Multi-Digit Addition Operations
Grade 6 Mathematics Building Strong Number Sense Using Tools and Strategies
What Are We Learning Today?
Solve multi-digit addition problems accurately Understand place value during addition Use strategies to check our answers Work with manipulatives and calculators
Place Value Warm-Up
Look at the number: 3,456 What digit is in the hundreds place? What digit is in the thousands place? Let's practice with more examples!
Adding with Base-Ten Blocks
Start with the ones place Regroup when you have 10 or more Move to tens, then hundreds Check your work by counting all blocks
Let's Practice Together!
{"left":"Problem: 347 + 286\nUse your base-ten blocks\nStart with ones place\nRemember to regroup when needed","right":"Problem: 529 + 195\nWork with your partner\nTalk through each step\nCheck your final answer"}
Calculators as Checking Tools
Solve the problem first with blocks or paper Use the calculator to check your answer Read the display carefully Compare: Does your answer match?
Think About It!
When might you use mental math instead of a calculator? How can you tell if your answer is reasonable? What strategies help you avoid mistakes?
Independent Practice Time
Solve: 456 + 287 Solve: 3.25 + 1.78 Use any method you choose Check your answers with a calculator Show your work on your whiteboard