Objective - To multiply decimals.

Slides:

Advertisements

Similar presentations

Multiplying Decimals 1. Multiply 2. Move the decimal.

Advertisements

Lesson 5-6 Example Example 2 Find 129 ÷ 9. Show the remainder. 1.Rewrite the problem in vertical format.

Lesson 5-4 Example Find 19 ÷ 3. Show the remainder. Step 1Rewrite the problem in vertical format.

Lesson 5-5 Example Example 2 Find 721 ÷ 7. 1.Estimate. 700 ÷ 7 = 100.

Changing Percents to a Fraction #3 To change a percent to a fraction you need to first write the numerator over 100. Next simplify the fraction.

2-5 Example 2 Find the product of 87 and 39. Use the traditional multiplication method. 1. Estimate. 90 × 40 = 3,600 Lesson 4-13 Example 2.

Lesson 4-8 Example Find the product of 231 and 7. Estimate first. Step 1 Estimate. 200 × 7 = 1,400.

Multiplying Decimals. Multiplying Decimals Notes Multiply as usual, ignoring the decimal points. Count how many total digits are to the right of the decimal.

EXAMPLE 1 Multiplying Decimals by Whole Numbers Find the product

EXAMPLE 1 Multiplying Decimals decimal places + 2 decimal places 4 decimal places.

Finding a Percent of a Number Lesson 6-7. Using a Proportion Set up a proportion that uses the percent over 100. Cross multiply to write an equation.

1-3 (A) Multiplying by Powers of 10. Rule Multiplying a decimal by a power of 10 greater than 1 moves the decimal point to the right the same number of.

Ordering Fractions and Decimals. Steps:  Change all decimals to fractions by dividing  Write all decimals vertically aligning the decimal  Begin comparing.

Multiplying and Dividing Decimals by 10, 100, and 1,000

Multiplying Decimals Lesson 1-7 From /

Multiply Decimals 1.Multiply as with whole numbers. 2.Count the total numbers in decimal place value for both factors 3.Place as many numbers of your FINAL.

You must follow the steps!

Lesson 5-4 Example Example 2 Find 14 ÷ 4. Show the remainder. 1.Rewrite the problem in vertical format.

Lesson 4-13 Example Example 1 Find the product of 27 and 52. Use the partial products method. 1.Rewrite the problem in vertical format. 52 × 27.

EXAMPLE 3 Multiply polynomials vertically and horizontally a. Multiply – 2y 2 + 3y – 6 and y – 2 in a vertical format. b. Multiply x + 3 and 3x 2 – 2x.

Lesson 4-7 Example Example 1 Find 4.32 × Multiply the factors, ignoring the decimal points for now. 432 × 6 = 2592.

Write Equivalent Fractions

Dividing a Decimal by a Decimal. Dividing Whole Numbers 12 ÷ 2 = 120 ÷ 20 = 1200 ÷ 200 = ÷ 2000 = Multiply both 12 and 2 by 10 Multiply.

Decimal Operations Jeopardy

1-3 Multiplication of Decimals Steps: 1.) Write the numbers vertically but do not line up the decimal points. 2.) Multiply as if there were no decimals.

Rounding (Decimal Places) Round each number to the given number of decimal places.

digit x 1 digit 3 DIGIT BY 2 DIGIT Multiplying Decimals 4 digit by 3 digit

Scientific Notation 1. Scientific notation is a way to shorten a large number (makes using it in calculations easier) 2.

Multiplying Decimals 6.NS.3 Fluently add, subtract, multiply and divide multi digit decimals using algorithms for each operation.

Fractions and Decimal Fractions Fractions Decimal Fractions

Conversions % Multiply by a special form of 1 Divide 2 by 5

Multiply By 2-Digit Numbers (B) Unit 2 Lesson 6. Objectives:

Divide decimals What is the answer to these divisions? 6 ÷ 3 In each case the answer is 2. The answer to a division is not changed if each number is multiplied.

EXAMPLE 3 Multiply polynomials vertically and horizontally a. Multiply –2y 2 + 3y – 6 and y – 2 in a vertical format. b. Multiply x + 3 and 3x 2 – 2x +

♣Multiplying Decimals♣

1. Multiply 2. Move the decimal

Finding a Percent of a Number

Multiplying Decimals by Decimals

Multiplying Decimals 3-6 & 3-7.

Finding a Percent of a Number

Name_____ 6__ Lesson 3 – Multiplying Decimals Nov_

Multiply Decimals.

Finding a Percent of a Number

Multiplying & Dividing by Powers of Ten

Standard Form: Ax + By = C

Multiplying Decimals by Decimals

Dividing Decimals.

Multiplying Decimals 3-6 & 3-7.

Multiplying Decimals Lesson 13.2.

Finding a Percent of a Number

Finding a Percent of a Number

Fractions, Decimals & Percentages

Decimals: Multiplying decimals

Unit 2. Day 14..

Decimals: Multiply or divide by 0.5?

. Find the product 2.73   decimal places

Percents and Decimals Objective:

Standard Form: Ax + By = C

Objective: Students will be able to multiply decimal numbers.

Multiplying Decimals by Decimals

Converting between Percentages, Decimals and Fractions

Multiplying Decimals Lesson 1-7.

Warm Up Simplify the expression by using distributive property and then combining like terms. x(x + 5) + 4(x + 5)

Addition & Subtraction Addition & Subtraction

Objective - To multiply decimals and whole numbers.

Multiplying Up.

Multiplying and Dividing Rational Numbers

Dividing whole number by a decimal

Multiplying and Dividing Decimals

Presentation transcript:

Objective - To multiply decimals. Use vertical format to multiply. 1) 2) 2 decimal places 2 decimal places 1 decimal place 2 decimal places 2+1=3, so product has 3 decimal places 2+2=4, so product has 4 decimal places

Use vertical format to multiply. 1) 2) 3)

Find the product.

Find the product.

6 places 7 places 6 places 8 places How many decimal places will each product have? 6 places 7 places 6 places 8 places

8 places 6 places 9 places 12 places How many decimal places will each product have? 8 places 6 places 9 places 12 places