4.NBT.B.4
Fluently add and subtract multi-digit whole numbers using the standard algorithm.
Use place value strategies to subtract two or more multi-digit whole numbers.
Develop fluency with the standard algorithm for subtraction when subtracting multi-digit whole numbers up to 999,999.
Use addition to check differences.
Use an estimation strategy with rounded whole numbers to check for reasonableness of a difference.
Tell when and how to use regrouping in subtracting multi-digit whole numbers.
Record differences using the standard algorithm for subtraction.
Explain the meaning of regrouping notation.
Discuss connections among place value strategies used to subtract multi-digit numbers.
Math Antics - Multi-Digit SubtractionÂ
reasonable - something that makes sense when given facts are taken into account.
regroup - to compose or decompose ones, tens, hundreds, thousands, and so forth. For example, 10 ones can be regrouped as 1 ten, or 1 hundred can be regrouped as 10 tens.
addend - a number being added.
algorithm - a set of routine steps used to solve problems.
estimate (noun) - an approximate value based on mathematical thinking.
estimate (verb) - to give an approximate number or answer based on mathematical thinking.
round - to approximate the value of a number by finding the nearest ten, hundred, or other place value.
difference - the result of subtraction.
sum - the result of addition.
iReady Teacher Assigned Lesson: Round Whole Numbers
Student pages 71 - 90
Check you Google Classroom page for additional assignments.
iReady Comprehension Check: Subtract Whole Numbers
