# LCM & HCF Combined Worksheet

New Activity (No Ratings Yet)
• Price per ClassroomFREE
• Grade Levels 5, 6, 7
• Topics Numbers & Operations
• Duration 20 Minutes
• Auto Scored? Yes
• Teacher Evaluation Needed? No

### Activity Description

In this activity, students will work to calculate the LCM and HCF of given numbers. As they solve each problem, if their answers are correct, letters of a secret code will gradually reveal themselves. The goal is for students to solve all the problems, decode the secret message, and unlock the hidden code.

### Teacher Tips

Included with the activity, you can view the tips to clarify student's doubts or to evaluate answers (for a teacher scored worksheet).

### Common Core: MATH

Number & Operations_Fractions

Add and subtract fractions with unlike denominators (including mixed numbers) by replacing given fractions with equivalent fractions in such a way as to produce an equivalent sum or difference of fractions with like denominators. *For example, 2/3 + 5/4 = 8/12 + 15/12 = 23/12. (In general, a/b + c/d = (ad + bc)/bd.)*

Number & Operations_Fractions

Solve real world problems involving multiplication of fractions and mixed numbers, e.g., by using visual fraction models or equations to represent the problem.

Number System

Find the greatest common factor of two whole numbers less than or equal to 100 and the least common multiple of two whole numbers less than or equal to 12. Use the distributive property to express a sum of two whole numbers 1-100 with a common factor as a multiple of a sum of two whole numbers with no common factor. *For example, express 36 + 8 as 4 (9 + 2).*.

Number System

Understand that integers can be divided, provided that the divisor is not zero, and every quotient of integers (with non-zero divisor) is a rational number. If *p* and *q* are integers, then -(*p*/*q*) = (-*p*)/*q* = *p*/(-*q*). Interpret quotients of rational numbers by describing real-world contexts.

Number System

Convert a rational number to a decimal using long division; know that the decimal form of a rational number terminates in 0s or eventually repeats.