2.1 Algebraic Expressions

• Letters standing for unknown numbers of classified objects
• Forming algebraic expressions from real-life situations
• Simple algebraic statements in words
• Forming algebraic expressions from simple algebraic statements
• Like terms, unlike terms and coefficients
• Simplifying algebraic expressions
• Algebraic expressions in Kenyan markets, school and home

• form algebraic expressions from real-life situations
• form algebraic expressions from simple algebraic statements in real-life situations
• simplify algebraic expressions in real-life situations
• appreciate the use of algebraic expressions in real-life

“How do we use algebraic expressions in daily activities?”

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1. Letters for classified objects
   40 min · 1 practice tasks · quiz
   Give each kind of object a letter so a group of pens and mangoes can be written as 3p + 2m.
2. Expressions from real-life situations
   40 min · 1 practice tasks · quiz
   Turn a kiosk tray, a fare and a school list into an expression such as 4p + 3m or 5p + 10.
3. Expressions from simple statements
   40 min · 1 practice tasks · quiz
   Turn phrases such as the sum of a number and 5 or 3 less than twice a number into n + 5 and 2n - 3.
4. Simplify algebraic expressions
   40 min · 1 practice tasks · quiz
   Add or subtract like terms so 3p + 2p becomes 5p, while p + m stays p + m.
5. Appreciate expressions in real life
   40 min · 1 practice tasks · quiz
   Use simplified expressions for market bills, school lists and changing prices, and say why letters are useful.