Using Algebra to Solve Problems

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Presentation transcript:

Using Algebra to Solve Problems Form 1 Mathematics Chapter 2 and Chapter 4

Reminder WB P.39-40, 42-43 SHW (II) – Yellow WB P.46-47 Open Book Quiz Today!!! (again!) SHW (II) – Yellow Today!!! WB P.46-47 31 Oct (Wednesday) Open Book Quiz Close Book Quiz 7 Nov (Wednesday) You must hand in on time!

Extra lesson Today’s last lesson Result of Close Book Quiz < 20 10, 12, 14, 16, 17, 21, 24, 27, 28, 30, 31 Take your Textbook!

Forming Equations Use a letter x to represent unknown number Follow the question and form an equation 根據問題，製造算式 Solve for x 算出 x 的值 Write answer in words (with units!) 寫出答案 (包括單位) Ronald HUI

Time for Practice Page 99 of Textbook 1A Questions 6 – 9

Time to practice Page 99 Question 8: There are three $100 notes and some $10 coins inside a bag. If there are altogether $460, how many $10 coins are there? Step 1: Let there are x $10 coins. Step 2: Then, 3 ($100) + x ($10) = $460 Step 3: 300 + 10x = 460 10x = 160 x = 16 Step 4:  There are 16 $10 coins. Ronald HUI

Good Luck! Enjoy the world of Mathematics! Ronald HUI