##### Home > Teacher’s Guide Resource Companion > Page 6 > Grade 4 – Developing Mental Math Skills
Grade 4 – Developing Mental Math Skills

• Describe and use strategies to:
• add and subtract two-digit numbers
• multiply to 10 × 10
• divide to 100 ÷ 10
• multiply whole numbers by 10, 100,
• and 1000, and divide by 10 and 100
• round four-digit numbers to the nearest ten, hundred, and thousand
• estimate addition, subtraction, and multiplication of whole numbers

– Focusing on the Fundamentals of Math – A Teacher’s Guide, p.6

## Text Resources

This curated list of documents have been selected to help you gain a deeper understanding of the above selection from “Focusing on the Fundamentals of Math – A Teachers Guide”. Each link will take you directly to the relevant section within the document. #### A Guide to Effective Instruction in Mathematics 4-6, Number Sense and Numeration, Vol 2, Addition and Subtraction #### A Guide to Effective Instruction in Mathematics 4-6, Number Sense and Numeration, Vol 3, Multiplication #### A Guide to Effective Instruction in Mathematics 4-6, Number Sense and Numeration, Vol 4, Division #### Learning Mathematics vs Following “Rules”: The Value of Student-Generated Methods 