➕ 5th Grade Math · Unit 2
Expressions and Whole Number Operations
17 short narrated lessons in 3 chapters, each with pictures, a quiz with a hint and a second try, and an explanation for every answer.
Standards: 5.OA.A.1 5.OA.A.2 5.NBT.A.2 5.NBT.B.5 5.NBT.B.6
What your child will learn
Numerical expressions
- Parentheses Go FirstEvaluate an expression with parentheses by doing the work inside the parentheses first.
- Which Step Comes First?Evaluate expressions by multiplying and dividing before adding and subtracting, working from left to right.
- Brackets and BracesEvaluate expressions that use parentheses inside brackets and braces, working from the inside out.
- Turning Words into MathWrite an expression for words like add eight and seven, then multiply by two.
- Compare Without CalculatingExplain how two expressions compare without calculating, like seeing that three times a sum is three times as large as the sum.
- Expressions Review ReviewReview writing and evaluating expressions with parentheses.
Multiplying whole numbers
- Powers of TenWrite powers of ten with exponents, like ten to the third power for one thousand, and explain the pattern of zeros.
- Multiplying with ZerosMultiply numbers by multiples of ten, one hundred and one thousand using basic facts and patterns of zeros.
- Multiplying by Two-Digit NumbersMultiply a three-digit number by a two-digit number with the standard algorithm.
- Bigger Numbers, Same StepsMultiply a four-digit number by a two-digit number with the standard algorithm and check with an estimate.
- Multiplying Review ReviewReview powers of ten and multiplying multi-digit whole numbers.
Dividing by two-digit numbers
- Dividing with ZerosDivide numbers by multiples of ten, like four thousand eight hundred divided by sixty, using basic facts.
- Estimating QuotientsEstimate a quotient by using compatible numbers that divide easily.
- Dividing with Partial QuotientsDivide a four-digit number by a two-digit number by subtracting groups of the divisor.
- Dividing with Area ModelsShow a division with a two-digit divisor using an area model and explain each step with multiplication.
- Division Review ReviewReview dividing by two-digit divisors and checking quotients.
- Unit 2 Test: Expressions, Multiplying and DividingShow what you learned in the whole unit (Numerical expressions, Multiplying whole numbers, Dividing by two-digit numbers) by answering mixed questions.
Try a question from this unit
From the lesson “Parentheses Go First”
Evaluate (2 + 6) × 3.
Show the answer
24. Inside the parentheses, 2 + 6 = 8. Then 8 × 3 = 24.
Hint kids see after a wrong try: “Do the work inside the parentheses first.”
Key words
- expression
- parentheses
- evaluate
- order of operations
- brackets
- braces
- interpret
- compare
- power of ten
- exponent
- multiple of ten
- standard algorithm
- partial product
- estimate
- product
- divisor
- quotient
- compatible numbers
- partial quotients
- area model
- dividend
Try these lessons in Kids Shelf
Narrated lessons, pictures and quizzes for every grade from K to 8. Works offline.
