e . 1' / I I I I , " / I I , -..._ ,1 'i,' . I .,.,, • v,/ •• lb=::=C'II A I g e bra Am~ya and her mother go to the nearby market to buy some items. 1. Amaya has a basket of SO cherries. Her mother gives her 30 more cherries. How many cherries does Ananya have in total? .........•••••••• 2. She buys five chocolates. She will give two chocolates to her friends. How many chocolates will be left with her? ................• 3. Her mother buys 5 pens each costing f I S. The total cost of 5 pens is ................. . 4· Amaya buys 130 sheets of paper for her brother's project. Her brother has to make 5 books with 13 0 sheets. How many sheets of paper will each book have? I wonder, why are we using letters instead of numbers in maths now. In this chapter, you will learn about: • Variables and constants Variables in rules • Algebraic expressions ' • Using expressio:q.s practically Yeah, it is like a secret code to find out the missing numbers. Let us learn about it. 

. ! ~I~ .. ~ ••• ~, ~ .'/~~ ~~ .· · S Chapter Review • 1111111111111111111111111111 111111111111111111 111111111111111111111111111111111111111111 • FLUENCY MULTIPLE CHOICE QUESTIONS b in algebra are called .... , ................ . 1. Letters used along with nu1u ers . c. letters . bl b. variant a. var1a es have a fixed nmnerical value. 2• ................... • • b. Literals a. Variables 3. 5 times x can be written as: b. 5 + x a. X 4. Name the property: (ax b) x c = a x (b X c). a. Commutative property c. Additive identity c. Literal numbers c. 5x b. Distributive property d. Associative property d. numerals d. Constants d. 5 + x S. 10 added to a number can be written as ..................... c 1 0 + x d. 1 0 a. 10-x b. IOx • ',. . . . 'd of the square is a is given by. 6. The general rule to find the perimeter of a square if one si e d. 4 + a a. 3a b. 2a c. 4a . el . . eadth of the rectangle are 1 and b, respectIVi y JS: 7. The general rule to find the perimeter of a rectangle if length and hr d (J + b) a.

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