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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