4th Grade Math

9. Multiples, Factors, Prime & Composite Numbers

NC.4.OA.4 Find all factor pairs for whole numbers up to and including 50 to: 

• Recognize that a whole number is a multiple of each of its factors. 

• Determine whether a given whole number is a multiple of a given one-digit number. 

• Determine if the number is prime or composite.

MULTIPLES OR FACTORS GAME - https://www.roomrecess.com/mobile/SnowPatrol/play.html 

Multiples:

MULTIPLES GAME:

https://www.mathplayground.com/mach_10_multiples.html 

Factor Pairs:

FACTOR PAIRS GAME:

https://www.mathplayground.com/math_lines_multiplication.html 

Prime & Composite Numbers:

PRIME & COMPOSITE GAME - https://www.roomrecess.com/mobile/SnowPatrol/play.html 

10. Number and Shape Patterns

NC.4.OA.5 Generate and analyze a number or shape pattern that follows a given rule.

11. Multi-Step Problems (+ - x ÷)

NC.4.OA.3 Solve two-step word problems involving the four operations with whole numbers.

 • Use estimation strategies to assess reasonableness of answers.

 • Interpret remainders in word problems.

 • Represent problems using equations with a letter standing for the unknown quantity.

12. Multiplication of Multi-Digit Numbers

NC.4.NBT.5 Multiply a whole number of up to three digits by a one-digit whole number, and multiply up to two two-digit numbers with place value understanding using area models, partial products, and the properties of operations. Use models to make connections and develop the algorithm.

1 digit x 3 digits

2 digits x 2 digits

13. Division: 3 Digit Numbers ÷ 1 digit Numbers

NC.4.NBT.6 Find whole-number quotients and remainders with up to three-digit dividends and one-digit divisors with place value understanding using rectangular arrays, area models, repeated subtraction, partial quotients, properties of operations, and/or the relationship between multiplication and division.

14. Equivalent Fractions

NC.4.NF.1 Explain why a fraction is equivalent to another fraction by using area and length fraction models, with attention to how the number and size of the parts differ even though the two fractions themselves are the same size.

15. Compare Fractions

NC.4.NF.2 Compare two fractions with different numerators and different denominators, using the denominators 2, 3, 4, 5, 6, 8, 10, 12, and 100. Recognize that comparisons are valid only when the two fractions refer to the same whole. Record the results of comparisons with symbols >, =, or <, and justify the conclusions by:

-Reasoning about their size and using area and length models.

-Using benchmark fractions 0, ½, and a whole.

-Comparing common numerator or common denominators (find the least common multiple of two different denominators and use that as a new denominator to create equivalent fractions with common denominators)