CAHSEE PREP. Session 1 Number Sense Chapter 1 OFL Prep Sessions

Why take the CAHSEE test and prep classes? It is required of ALL students to graduate high school. You need to get about 70% of the questions correct to pass the test. The prep classes will give you strategies and knowledge to help you on the test.

Test Taking Strategies Look through the test before answering any questions. Mark questions which look easy to go back to and work on first. Write down all formulas and stored knowledge before answering questions. Show all your work and circle the answers in your workbook.

Absolute Value Everything inside the | | symbol becomes positive when the symbol is removed.

If the numbers have the same sign, add and keep the sign. If the numbers have different signs, subtract the numbers and keep the sign of the larger number. Adding and Subtracting Integers

Multiply and Divide Integers Drama Club members are washing cars to earn money for their script fund. Each car washed adds $5 to the fund. Each script they buy subtracts $6 from the fund. How much does the fund increase if they wash 20 cars? Multiplication and Division: (+) x (+) = + (-) x (-) = + (+) x (-) = - or (-) x (+) = -

Add and Subtract Fractions Fractions must have the same denominator before adding or subtracting. Elizabeth needs ¾ of a cup of flour for a recipe. She only has ¼ of a cup. How much more flour does she need?

More Add and Subtract Fractions

Add and Subtract Mixed Numbers and Improper Fractions First you need a common denominator. MIXED NUMBERS: Then add the fractions, followed by the whole numbers

Add and Subtract Mixed Numbers and Improper Fractions

Multiply and Divide Fractions and Mixed Numbers Change Mixed Numbers to Fractions:

Multiply and Divide Fractions and Mixed Numbers

Decimals

Exponents Zero Exponents Negative Exponents Product Powers Quotient Powers exponent base

Exponents

Scientific Notation Scientific Notation allows you to express very large or very small numbers without having to use numerous zeros. In 2003, about 2,900,000 people attended conferences for engineers. What is this number written in scientific notation?

Scientific Notation

Convert Fractions, Decimals, and Percents

The paint-by-number directions said to paint 60% of the circle red. What fraction of the circle should NOT be painted?

Convert Fractions, Decimals, and Percents

Percentage Change A box of cards originally sold for $4. Now it sells for $6. What is the percent increase?

Percentage Change Malory’s cat weighed 24 pounds before it was put on a diet. After 5 weeks it weighed 19 pounds. What is the approximate percent of decrease?

Percentages At Joe’s Electronics Store, a CD player regularly costs $ It is on sale for 30% off. What is the sale price?

Percentages The owner of Carmen’s Bike Shop buys bicycle tires for $6.00 each and sells them to her customers with a 20% markup. What is the retail cost of the bicycle tire?

Percentages A $125 ski jacket is on sale for $ What is the percent of the discount?

Percentages Lydia sold $ in clothing. She gets a 5% commission on the clothes she sells. What is her commission on the clothing sales?

Roots The square roots of n are all the numbers of m so that m 2 = n.

HOMEWORK See Assignment Sheet – Session 1 Homework is due at the next class meeting or by the assigned date!