Learning Goals Students will learn to round natural numbers so that they can approximate the result of given equations. Students will use their knowledge.

Slides:

Advertisements

Similar presentations

Multiplication Practice Do you know how to multiply with double digits?

Advertisements

Long Multiplication What is long multiplication?

Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall. Chapter 1 The Whole Numbers.

2-4 Round 3,531 to the nearest hundred.

Rounding Numbers to the 100 Thousands Place

Multiplication by multiples of 10 and 100 Objective to multiply numbers when 0’s are involved.

Math 5 Unit Review and Test Taking Strategies

Place Value and Estimation

ESTIMATION ROUNDING NUMBERS. DEFINITION To calculate approximately (the amount, extent, magnitude, position, or value of something).

STEP 1 Multiply the digits in the ones place. Write the product in the ones place of the answer box. If the product is greater than ten, carry the number.

Whole number estimation, addition example: 28 round each # to the +110 _____ nearest ten. _____ Round 28 to 30 and 114 to 110. For example, 28.

Rounding of Numbers Up to Hundred Millions

Round to Nearest 10 and 100 Copyright © 2013 Kelly Mott.

Multiplying Decimals Type your name and send: Next slide.

Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall. Chapter 1 The Whole Numbers.

$100 $200 $300 $400 $100 $200 $300 $400 $300 $200 $100 Multiply by 1 digit numbers Multiply & estimate results Multiply by 2 digit numbers Multiply.

LI: To be able to organise numbers by thinking about place value

5 Minute Math In which place is the 4 in each of the following: 140,399 48, ,394 Write 2 equivalent fractions for each of the following:

With Two-Digit Numbers. 1a. Multiply one’s column x 1 1 * 1 = 1.

CONFIDENTIAL 1 Good Afternoon! Today we are going to learn about ROUNDING whole numbers. 1.) Find the next number in the pattern. 22, 23, 25, 28, ____.

can be easy !! 68 x 4 We are going to multiply 68 by 4.

Chapter 1 Whole Numbers Digit – number from 0-9

Estimation Whole numbers, Sums, Differences, Products, and Quotients.

LO: I can multiply using the Grid Method. Please note that this is for 3 Digit Numbers but it still shows how this works. Yr 5’s target is to multiply.

January 21, 2010Math 201 OBJECTIVE: Students will be able to estimate a a percent of a quantity AIM: How can we use rounding and mental math to help us.

Draw two number lines from 0 – 5.

Multiplying Large Numbers (Traditional Method)

Year 5 - Numeracy Title page..

Expanded Short multiplication How it should look (for 45 X 6)

Grade 6 Math Test Review Representing Numbers, Place Value, Decomposing Numbers, Comparing Numbers, Rounding Numbers, Multiplying 3-Digits by 2-Digits,

Estimation Rounding to the nearest tens and hundreds place. (If you just want to practice, click here!)

Multiplication.

Objective - To round whole numbers.

Multiply By Two Digits Created by M. Guy.

Estimation : Rounding When rounding numbers which are exactly in the middle, the convention is to round up rounded to the nearest 10 is Numbers.

2 Digit by 2 Digit Multiplication

4 3 9 H T U What is the most significant figure in

Rounding numbers to any thousand place value

Round to the nearest 1000.

Round to the nearest 100.

How to Multiply By Two Digits

Rounding Review Tens and Hundreds

Rounding Review Tens and Hundreds

Multiplication Pages

Estimate Products 2 CCSS: 4.NBT.5 93 x x 70 6, ,

Multiplying Matrices.

Estimating With Decimals

Division Page 87 – 119.

Lesson Objective: To be able to round numbers

Rounding Review Tens and Hundreds

Comparing and Ordering Decimals

Multiplication Multiplying 3 or more digits by 2 digits.

Multiplying Matrices.

Addition Grade 4.

Unit 4 Lesson 10 Estimate Products Use Rounding to Estimate Products.

When we multiply by 10 we are making the number ten times bigger.

MULTI-DIGIT MULTIPLICATION.

Presentation transcript:

Rounding Natural Numbers and Multiplying 3-Digit Numbers by 2-Digit Numbers

Learning Goals Students will learn to round natural numbers so that they can approximate the result of given equations. Students will use their knowledge of multiplying 1-digit numbers so that they can multiply 3-digit numbers by 2-digit numbers.

Vocabulary Approximate Value Equation Factor Multiplication Multiply Product Rounding

Rounding Natural Numbers When you round a number, you replace it with one of approximate value Rounding numbers helps you estimate operations and makes mental calculation easier

Rounding 542 329 to the Nearest Thousand Step Example 1. Circle the digit in the position to which the number will be rounded. 542 329 2. Look at the digit to the right of the circled digit. -If less than 5, the digit to be rounded does not change -If greater than or equal to 5, the digit is rounded by 1 3. Replace all the digits to the right of the circled digit with 0 542 000 542 329 is closer to 542 000 than to 543 000

Let’s Round Some Numbers 322 190 (nearest Th) 15 200 (nearest TTh) 295 372 (nearest T) 186 (nearest H) 5 173 (nearest Th) 322 000 20 000 295 370 200 5 000

Individual Work The reference page in your workbook is A-12 Take 5 minutes to complete: Question #1 on page A-12 Question #2 on page A-13 Question #3 on page A-13 Question #4 on page A-13

Multiplying 3-Digit Numbers by 2-Digit Numbers Understanding a multiplication question: 829 x 74 = 61 346 1st Factor multiplied by 2nd Factor equals the Product

Multiplying 3-Digit Numbers by 2-Digit Numbers Multiply each digit in the number 829 by 4 (units). Don’t forget to carry! 1 3 Th H T U 8 2 9 7 4 6 x

Multiplying 3-Digit Numbers by 2-Digit Numbers Place a 0 in the units column. Multiply each digit in the number 829 by 7 (tens). 2 6 TTh Th H T U 8 9 7 4 3 1 5 x

Multiplying 3-Digit Numbers by 2-Digit Numbers Add the 2 products to find the final product of the multiplication 2 6 TTh Th H T U 8 9 7 4 3 1 5 x +

Individual Work The reference page in your workbook is page A-14 Take 5 minutes to complete: Question #1 on page A-15 Question #2 on page A-15 Question #3 on page A-16

Put It All Together Complete questions 1 and 2 on page A-17 Supplementary Activity 1-4