MENTAL MATH Rounding Addition and Subtraction Strategy: Estimate the answer by rounding each number to the nearest hundred Examples: 32 30 45 50 + 47.

Slides:

Advertisements

Similar presentations

Unit 2 Estimation and Computation. CFA: Unit 2 1. What digit is in the hundreds place? A. 5 B. 6 C. 3 D. 1.

Advertisements

Mental Math Subtractions Additions

MENTAL MATH General Review = 60 – 10 = =

5-Minute Check 1) 5 x 7 2) 7 x 70 3) 9 x 20 4) 4 x 800 5) 6 x ) The each person to eat for one week is $200. Find the total cost for a family of.

To the tens, hundreds and thousands

Rounding and PEMDAS Practice Problems

Today’s Mental Math Write the date and number 1-10 Today’s title: MM #13 Practice Quiz It will start in 2 minutes and 0 seconds It will start in 1 minute.

Math Rounding By Grade 4.

Prerequisite Skills VOCABULARY CHECK Copy and complete using a review word from the list; variable, variable expression, perimeter, area. ANSWER variable.

Date: _____________Math 9/9H Place Value Which position is a digit of a number occupying? E.g.: is in the millions place 9 is in the hundred.

Adding and Taking Away The Easy Way Mental Maths Learning Objectives I will be able to use a number of different mental strategies to add and subtract.

Mental Math Rounding Numbers to the Nearest Hundred and Thousand.

$100 $200 $300 $400 $100 $200 $300 $400 $300 $200 $100 Estimate with pictures Round to nearest hundred Round to nearest thousand Add / subtract & estimate.

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

5th Grade Module 2 – Lesson 18

Math Review. Stretch Your Thinking Compare 25,516 24,165.

MENTAL MATH Subtracting Tens and Compensate Strategy: When subtracting numbers ending in 7, 8, or 9, round that number to the nearest tens and then add.

Estimating Fractions.

Complete and Check Answers Before Doing Other Activities

Event 4: Mental Math 7 th /8 th Grade READY! 5 PENCILS DOWN.

When estimating, 1.) You should be able to do the computation in your head 2.) Your answer should be close to the exact answer 1-1 Estimating sums, differences.

Event 4: Mental Math 5 th & 6 th grade Math Meet 2015.

$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.

Answer: 50% of 46 is 23. Find Percent of a Number Mentally

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

1 EstimationStrategies Press Ctrl-A ©2009 – Not to be sold/Free to use Stage 5 Year 9.

LO: to round to the nearest 10 Which ten is the following number nearest to?

MENTAL MATH DRAW THAT SHAPE In this timed test you will have to DRAW some geometric figures. Some may be able to be drawn two or three different ways.

Mathsercise-C Rounding Ready? Here we go!. Estimate the value of: 1 Rounding x 7.85 Answer Question 2 Round each number to a sensible figure.

Unit 2 Lesson 9 Part 2: Estimating Sums to the Nearest 100 Copyright © 2010 Kelly Mott.

Module 2 Lesson 20 Estimate differences by rounding and apply to solve measurement word problems.

MENTAL MATH Front End Mental Math with Addition Strategy: Add the tens place first and then the ones place = = =

Math symbols Rounding 2 digit numbers to the nearest tens Rounding 3 digit numbers to the nearest tens Rounding 3 digit numbers to the nearest hundreds.

Warm Up Problem of the Day Lesson Presentation Lesson Quizzes.

Event 4: Mental Math 5th/6th grade Math Meet ‘11.

Adding and Subtracting Decimals

Rounding Numbers to the Nearest Hundred

Lesson 9 Rounding to any digit.

ROUNDING 54 ______ 26 ______ 39 ______ 13 ______ 99 ______ 07 ______

36 LO: to round to the nearest 10

Rounding numbers to any thousand place value

Chapter 1 Review quizzes chapter 1 quizzes.

Estimating With Decimals

Division Page 87 – 119.

Rounding Numbers Name: ___________________________________

MATH UNIT #1 Addition and Subtraction

Use Strategies and Properties to Multiply by 1-Digit Numbers

Adding and Subtracting Decimals

Adding and Subtracting Decimals

Year 2 Summer Term Week 9 Lesson 3

Rounding off (Outcome).

Finding a Percent of a Number

Division Dividing 3 and 4 Digits by 2 Digits.

Using Number Sense to Solve One-Step Equations

grade 3-4 addition and subtraction

Lesson 1-9 U. S. Traditional Subtraction

Estimating before you add or subtract will help you check whether your answer is reasonable. Helpful Hint.

Year 2 Summer Term Week 9 Lesson 3

Division of Large Whole Numbers

Presentation transcript:

MENTAL MATH

Rounding Addition and Subtraction Strategy: Estimate the answer by rounding each number to the nearest hundred Examples:

Practice with… Estimation by Rounding

Timed Quiz Beginning with the next slide you will have 10 seconds to answer each question using the mental math strategy just practiced. There will be 10 questions to do. Put the title “Mental Math” at the top of your page, your name to the right, and then numbers 1 to 10 below. Only your answer will go beside the question number. Your page should look like the following:

Mental Math Susan Black NOW…. Get ready to begin….

Question

Question

Question

Question

Question

Question

Question

Question

Question

Question

Now get ready to check your answers…