4.NBT.B. Use place value understanding and properties of operations to perform multi-digit arithmetic.

• To regroup or not to regroup

4.NBT.B.4. Fluently add and subtract multi-digit whole numbers using the standard algorithm.

• No tasks yet illustrate this standard.

4.NBT.B.5. Multiply a whole number of up to four digits by a one-digit whole number, and multiply two two-digit numbers, using strategies based on place value and the properties of operations. Illustrate and explain the calculation by using equations, rectangular arrays, and/or area models.

• Thousands and Millions of Fourth Graders

4.NBT.B.6. Find whole-number quotients and remainders with up to four-digit dividends and one-digit divisors, using strategies based on place value, the properties of operations, and/or the relationship between multiplication and division. Illustrate and explain the calculation by using equations, rectangular arrays, and/or area models.

• Mental Division Strategy