1. UNIT 09 April
1. Write the algebraic expression of:
a) The double of a number
b) The previous one of a number
c) The following number of a number
d) The double of the following number
e) The half of a number
f) The half of a number minus six units
2. Indicates which are monomials:
𝒂𝒂) 𝒂𝒂 + 𝒃𝒃
𝒃𝒃) 𝟓𝟓𝒙𝒙𝟑𝟑
𝒄𝒄) 𝒂𝒂𝟐𝟐
𝒃𝒃𝟐𝟐
𝒅𝒅) 𝟐𝟐𝒙𝒙𝟑𝟑
− 𝒙𝒙
𝒆𝒆) − 𝟐𝟐𝟐𝟐𝟐𝟐
𝒇𝒇) 𝟐𝟐𝒂𝒂 − 𝟑𝟑𝒂𝒂𝟐𝟐
𝒈𝒈) 𝒙𝒙 − 𝟐𝟐
𝒅𝒅) 𝒙𝒙𝒙𝒙𝒙𝒙
3. Write the degree of this monomials:
𝒂𝒂) 𝟕𝟕𝒙𝒙
𝒃𝒃) 𝟓𝟓𝒂𝒂𝟒𝟒
𝒄𝒄) 𝟑𝟑𝒙𝒙𝟐𝟐
𝒅𝒅) 𝟐𝟐𝒃𝒃𝟑𝟑
𝒆𝒆) 𝟔𝟔𝒂𝒂𝒂𝒂
𝒇𝒇) 𝟓𝟓𝒙𝒙𝟐𝟐
𝒚𝒚
𝒈𝒈) 𝒂𝒂𝟐𝟐
𝒃𝒃𝟐𝟐
𝒉𝒉) 𝒙𝒙𝟐𝟐
𝒚𝒚𝟑𝟑
4. Solve:
𝒂𝒂) 𝒙𝒙 + 𝒙𝒙
𝒃𝒃) 𝒂𝒂 + 𝒂𝒂 + 𝒂𝒂 + 𝒂𝒂 + 𝒂𝒂
𝒄𝒄) 𝒎𝒎 + 𝒎𝒎 + 𝒎𝒎 − 𝒎𝒎
𝒅𝒅) 𝒂𝒂 + 𝒃𝒃 + 𝒂𝒂 + 𝒃𝒃
Axel Cotón Gutiérrez Mathematics 1º ESO Exercises – 1.9.1.1