Step 1: Starting in the right-hand column (units) multiply 4 and 3. We need to find the answer to the calculation 23 × 14.įirst write your numbers in columns representing hundreds, tens and units (See our Numbers page for help). As we have already discovered, we could write the calculation the other way around. Assuming each employee eats one sandwich, how many sandwiches does Lisa have to make?Ģ3 businesses each need 14 sandwiches, which is 23 lots of 14 or, in other words, 23 multiplied by 14. She has to deliver sandwiches to 23 businesses each with 14 employees. However, we can still use it to make the calculation easier. In this case the multiplication table above cannot give an immediate answer. It is often necessary to multiply numbers that are bigger than 10.
It doesn't matter which way around you search for the numbers if you find 4 in the first column and 6 in the first row you get the same answer, 24. To obtain the answer to 4 × 6, for example, find 4 on the top (red shaded) line and find 6 on the left hand (red shaded) column – the point where the two lines intersect is the answer: 24. This table gives the answers to all multiplications up to 10 × 10. 4 × 2000 for example is 4 × 2 = 8 with 3 zeros: 8000.įor simple and quick multiplication it is useful to memorise the multiplication or ' times table’ as shown below. When multiplying by 100 we write two zeros at the end, by a thousand we write three zeros at the end and so on.When a whole number is multiplied by 10 we can simply write a 0 at the end (there is one zero in 10 because it is 1 × 10).When a number is multiplied by two we are doubling the number.Any number multiplied by 1 stays the same.Understanding Statistical Distributions.Area, Surface Area and Volume Reference Sheet.Simple Transformations of 2-Dimensional Shapes.Polar, Cylindrical and Spherical Coordinates.Introduction to Cartesian Coordinate Systems.Introduction to Geometry: Points, Lines and Planes.Percentage Change | Increase and Decrease.Mental Arithmetic – Basic Mental Maths Hacks.Ordering Mathematical Operations - BODMAS.
Common Mathematical Symbols and Terminology.
Special Numbers and Mathematical Concepts.How Good Are Your Numeracy Skills? Numeracy Quiz.
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