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Back to Finite and Infinite Sets — Problem 4 · Task Set 1

Exercises: Finite and Infinite Sets

Work through each section in order. Give a reason where a problem asks for one.

Grade 7·17 problems·~30 min·Uganda NCDC Primary 7 Mathematics·lesson·sets-01
Work through problems with immediate feedback
A

Fluency Practice

1.

The set {1,2,3,…,20}\{1, 2, 3, \ldots, 20\} has an ending number, so it is   ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲   . It has   ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲   elements.

finite or infinite:
number of elements: