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Transcript
Negative numbers are numbers that are less than zero. We write a minus sign in front of the digits to show that they are negative. Negative Numbers (less than 0) -10 -9 -8 -7 -6 -5 -4 -3 -2 -1 Positive Numbers (more than 0) 0 1 2 3 4 5 6 7 8 9 10 Looking at number lines can help us to understand negative numbers. Lower numbers are on the left and higher numbers are on the right. 5 is higher than -7 -1 is higher than -9 Is -8 higher or lower than 7? Is 14 higher or lower than -15? We use negative numbers in many different ways. The temperature is -7oC. It’s VERY cold! The coordinates of the green circle are (-6, 4). My bank balance is -£100. I owe the bank 100 pounds! Level -3 is three floors below ground floor. When you are solving negative number problems with a calculator, look for the +/- key. Let’s work out -5 + 7 using a calculator. Press these buttons… +/- 5 + 7 = This tells the calculator to make the next number that you enter negative. The answer is 2. Negative Numbers Positive Numbers -10 -9 -8 -7 -6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 7 8 9 10 5 6 7 8 9 10 5 6 7 8 9 10 Negative Numbers Positive Numbers -10 -9 -8 -7 -6 -5 -4 -3 -2 -1 0 1 2 3 4 Negative Numbers Positive Numbers -10 -9 -8 -7 -6 -5 -4 -3 -2 -1 © 0 1 2 3 4 www.teachingpacks.co.uk Images: © ThinkStock Write five negative numbers that are larger than: Write five negative numbers that are larger than: -30 -10 1 2 Write five negative numbers that are less than: Write five negative numbers that are less than: -5 -100 3 4 © www.teachingpacks.co.uk Images: © ThinkStock What numbers are shown by the arrows on this number line? -10 -5 What numbers are shown by the arrows on this number line? 0 9 10 Mark the following three numbers on the number line below. -9 -10 0 -25 -4 Mark the following three numbers on the number line below. -2 -5 -80 0 11 -90 12 © www.teachingpacks.co.uk Images: © ThinkStock -75 -9 0 1. -2 - -8 + 1 - -5 4 - -9 + + = + -9 - -9 3 = -10 -6 © www.teachingpacks.co.uk Images: © ThinkStock + -7 4. = + = 6 - -7 + = + - + 0 -6 + = 5 + = = + = = -4 = - -10 + = + + = + -9 + 3 = + - = = - + + 4 = - 0 - = 3 + - + Can you calculate the total of each row and column in the boxes above? A -8 + = = 2 - + = = + -8 + + + 5 - = - = + 8 + -9 + = - -9 2. = + + + 1 - = + -2 - - = 3. + + + 2 -8 1 + = = + = = www.teachingpacks.co.uk Thank you for looking at our preview resources. We hope that they are useful to you. Join us today to download thousands of resources from our popular Teaching Packs! Mark and Helen