Mathematics 1 ESO – Unit 3 FACTORS AND MULTIPLES extra activities
1 – Watch the video on “What Is a Factor in Math?” and answer:
- a) Fill in the gaps:
- I) All numbers can be decomposed into ____________ .
- II) We can use a __________ _______ and decompose 42 into its factors.
- III) 42 is even, so you know that 2 always goes into that.
- IV) 2 goes into ____ 21 times.
- V) 21 can be _________ decomposed into 3 and 7.
- VI) A prime factor has factors of 1 and __________ .
- VII) So now we have _____________ the factors of 42 into its prime factors.
- b) Use the “factor tree” to decompose these numbers into its factors:
- I) 60 II) 90 I) 210
2 – Watch the video on “What is a Divisor (or a Factor)?” and answer:
- a) How do we call an integer if it divides another integer evenly?
- b) Why 3 is not a divisor of 11?
- c) Why 3 is a divisor of 15?
- d) What is the meaning of a vertical line between two integers?
- e) What means the slash through the divisor symbol?
- f) What other word we can use to say divisor?
