Chapter 1, Lesson 4


1-4.A distinguish between factors and multiples
Which of the following numbers are whole-number factors of 10 and which are whole-number multiples of 10?
1, 2, 4, 5, 10, 20, 25, 30


1-4.B identify common factors in a fraction
Which of the following numbers are factors of both the numerator and denominator of the fraction ?
1, 2, 3, 4, 5, 15, 25, 50, 100