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LET'S REVISE  1) Andy purchased few items from Dubai Mall, cost these items are as follows   :Apples – Dhs 80.10, pair of Shoes – Dhs 123.70, Mixed fruit Jam 23.30 , Kellog’s corn flakes – 22.75        Prepare   a bill to show the amount paid by him    Dubai Mall    Name:___________    Date:________              Bill NO 23543 S.no Description No of items                   Total 2)   23 is added to 86. From the result, 54 is subtracted.            What number will remain? a) 31                b) 32                 c) 55              d) 163 3) Amy, Lusy, Kiran counted the story books they had. Amy had 230books,Lusy had 250books.Amy and Lucy together has 10 books more than these two. How many books she has now? 4)  Jane says When two numbers are added, the sum is the same regardless of the order of the addends. Is she correct? What is

Measurement Measurement is finding a number that shows the size or amount of something. We can measure ... Length Length is how far from end to end. Also called Distance. The length of this guitar is about  1 metre  (slightly more than  1 yard ). Volume Volume is the amount of 3-dimensional space an object occupies. Also called Capacity. This jug has exactly  1 litre  of water in it (slightly more than  2 pints ) Mass (Weight) Mass is how much matter something contains. This bar of Gold has a Mass of  1 kilogram  (slightly more than  2 pounds ) (Weight is "Heaviness" ... the downward force caused by gravity on an object.) LET'S EXPLORE LENGTH Length Measuring how long things are, how tall they are, or how far apart they might be are all examples of length measurements. Metric units of length review (mm, cm, m, & km) Millimetres Centimetres Metres Kilometres Small units of length are called milli

. Using Arrays to Show Multiplication Concepts:  An arrangement of objects, pictures, or numbers in columns and rows is called an  array . Arrays are useful representations of multiplication concepts. This array has 4 rows and 3 columns. It can also be described as a 4 by 3 array. This array has 5 rows and 4 columns. It is a 5 by 4 array. Notice that the rows in each array are equal. Think of the rows as equal groups. Your students used equal groups to multiply in second grade. Look at this example. When equal groups are arranged in equal rows, an array is formed. When you show students the connection between equal groups and arrays, students can easily understand how to use arrays to multiply. They will use arrays again later to divide. Look at the multiplication sentence that describes the array below. The numbers in multiplication sentences have special names. The numbers that are multiplied are called factors. The answer is called the pro

Estimation of Whole Number Addition and Subtractio n To  estimate  means to find an answer that is close to the exact answer. The key with  estimation  is to only use it in instances that don’t require an exact answer.  Estimation means to find an answer that makes sense and works with the problem, but is not necessarily exact. You can estimate  sums  (the answers to addition problems), and  differences  (the answers to subtraction problems) .  The first step in estimating a  sum  or a  difference  is to  round  the numbers, by changing them to the nearest power of ten, hundred, thousand, etc. Round the numbers first, then use mental math to estimate an answer. When rounding, follow these rounding rules: When rounding, follow these rounding rules: When rounding, follow these rounding rules: If the number being rounded is less than 5, round down. If the number being rounded is 5 or greater, round up. Some key things to think about when estimating: The estimate m

3 strategies to conquer word problems Stepping through  Solve the worksheet and post the answers in the comment box below.

 Subtraction techniques  Subtraction by "Regrouping" (Also called "borrowing" ) To subtract numbers with more than one digit: write down the larger number first and the smaller number directly below it     making sure to line up the columns! Smaller Number - Bigger Number But what if a column has a  smaller number on the top? How do we do  2 - 5  ? The Solution : Make the "2" larger by "regrouping" (press arrow button): In  32 : the "3" means  3 tens , the "2" means  2 ones , So we: reduce the 3 by  1 increase the 2 by  10 And we get: 2 tens , 12 ones To create your own  simple mind map, you may use  Min d Meister , to try it  click here  AND POST IT IN THE COMMENT BOX

Let's Reflect: Subtraction is ... ... taking one number away from another. Start with 5 apples, then  subtract 2 , we are left with 3 apples. This can be written: 5 − 2 = 3 O ther names used in subtraction are  Minus, Less, Difference, Decrease, Take Away, Deduct. The names of the numbers in a subtraction fact are: Minuend − Subtrahend = Difference Minuend : The number that is to be subtracted from. Subtrahend : The number that is to be subtracted. Difference: The result of subtracting one number from another. Let's revise properties of subtraction: Let's try: Post your answers in the comment box.

Watch the video and name the currency you see in the video. Activity: Concept: Money (four operations) Learning Objective: to calculate expenditure and handle money in everyday situations. Materials: Coins of  50 fils, 25 fils 1Dhs, 5Dhs, and 10Dhs.and paper and pencil. Method : 1.  Put children in groups of 3 2. Give each group a bag with some coins & photocopies of notes. 3. Let them count the denominations and record it. 4. Ask each member of the group to take out 1 coin / note from the bag. 5. Let them now find the new total of each denomination without counting (Using the concept of subtraction.) Denomination Number Total amount Withdrawn New total 50 Fills 5 Rs. 2.50 1 Rs.2.25 25 Fils 1 Dhs 12 Rs.12 3 Rs.9 5 Dhs 10 Dhs

Addition with and without regrouping Please click below to get more information on this https://www.khanacademy.org/math/arithmetic/arith-review-add-subtract/arith-review-add-within-100a/v/adding-two-digit-numbers-without-regrouping Try this out!!!!

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Solve the following : How many hundreds are there in 6892 ?  How    many    thousands make    3478   ? Each time you move a place from right to the left in a place value chart, the value of the digit gets  ------------------  times bigger.   Skip count by 1000’s and fill in the blanks:   7,432      8,432                               ,               ,                        Write the expanded notation of    4,786.   Put the correct symbol (< > =) 1534 + 200   -------------      1450 – 400 Find the sum of the place values of 7 in 7,897 .  

Rounding Numbers - Rules & Examples A rounded number has  about the same value  as the number you start with, but it is  less exact. For example, 341 rounded to the nearest hundred is 300. That is because 341 is closer in value to 300 than to 400. When rounding off to the nearest dollar, $1.89 becomes $2.00, because $1.89 is closer to $2.00 than to $1.00 Rules for Rounding Here's the general rule for rounding: If the number you are rounding is followed by 5, 6, 7, 8, or 9, round the number up.  Example: 38 rounded to the nearest ten is 40 1 If the number you are rounding is followed by 0, 1, 2, 3, or 4, round the number down.  Example: 33 rounded to the nearest ten is 30 What Are You Rounding to? When rounding a number, you first need to ask:  what are you rounding it to?  Numbers can be rounded to the nearest ten, the nearest hundred, the nearest thousand, and so on. Consider the number 4,827. 4,827 rounded to the nearest ten