Mystery Number Factor Riddles
Scaffolded factor pairs for 24 and 36, a prime-composite sort of eight numbers, four is-it-a-multiple checks, and two mystery-number riddles. 4.OA.4.
4th Grade Factors and Multiples Worksheets
4.OA number work: finding all factor pairs for whole numbers from 1 to 100 and determining whether a number is prime or composite.
4th Grade Math6 worksheets
Factors and Multiples worksheets to download
Factor Pairs to 100
Factor pairs for 24, 45, 31 and 60, a divisibility grid for 54 to 90, three ways to arrange 48 chairs, and one number that breaks Maya's claim.
Prime or Composite Sort
Sort twelve numbers into five primes and seven composites with factor-pair proof. 49 and 51 are the traps, and Maya's ends-in-1 rule gets tested.
Factors, Multiples, and Patterns Test
Ten-question unit test: factor pairs of 36, true-false traps like 5 and 82, classifying 17 to 49, and a tile pattern growing 2, 5, 8. 4.OA.4-5.
Number and Shape Patterns
Extend add-3, doubling and add-10 patterns and name each hidden feature, find the 17th shape without drawing, and prove Leo's sequence stays even.
Factors and Multiples Venn Diagram
Venn sorts: factors of 24 and 36 with the GCF in the overlap, then thirteen numbers against multiples of 4 and 6, with 15 and 27 fitting neither.
Curriculum objectives covered
4.OA.4
“Find all factor pairs for a whole number in the range 1-100. Recognize that a whole number is a multiple of each of its factors. Determine whether a given whole number in the range 1-100 is a multiple of a given one-digit number. Determine whether a given whole number in the range 1-100 is prime or composite.”
4.OA.5
“Generate a number or shape pattern that follows a given rule. Identify apparent features of the pattern that were not explicit in the rule itself. For example, given the rule "Add 3" and the starting number 1, generate terms in the resulting sequence and observe that the terms appear to alternate between odd and even numbers. Explain informally why the numbers will continue to alternate in this way.”
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Multi-Digit Operations
4.NBT computation: fluently adding and subtracting multi-digit whole numbers using the standard algorithm.
Fractions and Decimals
4.NF fractions: explaining why a fraction a/b is equivalent to (n x a)/(n x b) and recognizing equivalent fractions.
Measurement and Data
4.MD measurement: applying the area and perimeter formulas for rectangles in real-world and mathematical problems.
Geometry
4.G geometry: drawing and identifying lines and angles and classifying shapes by properties of their lines and angles.