Home > iMath Worksheets > Number: Integers, powers and roots
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 Order, add, subtract, multiply and divide positive and negative numbers An example of a wall puzzle: five numbers are on the wall. Write the five numbers below the wall on the right bricks in the wall. Age 12-14 Wall puzzles The number on a brick is either the sum, difference or product of the two numbers below. There are 6 levels of difficulty going from showing 5 numbers on the wall (the easiest) to showing none of the numbers on the wall. Use the slider to determine how many numbers are on the wall then click on the 'change' button. You will only see the effect when the worksheet is printed There are two types of worksheet: The numbers on the bricks are the sum of the two numbers below The numbers on the bricks are the product, sum or difference of the two numbers below Age 11-12 Add and subtract positive and negative numbers. Write a number in each circle so that the number in each square equals the sum of the two numbers on either side of it. Sum puzzle Age 12-13 Multiply positive and negative numbers. Write a number in each circle so that the number in each square equals the product of the two numbers on either side of it. Product puzzle 1 Age 11-13 Sum, Difference and Product A problem-solving activity Two numbers (positive or negative) are generated, their sum, difference and product are worked out. Work out what the two numbers are. Age 12-13 Complete this multiplication table. Positive and negative numbers are used. Multiplication table 1 Age 11-12 Missing numbers: Answer questions such as -12 + = -19 Complete the magic squares 3 x 3 magic square 4 x 4 magic square Age 11-12 Number cell puzzles: the empty cells are filled by adding the two preceding numbers. Number cell puzzles

 Recognise multiples Age 11-12 Find the lowest common multiple of two numbers, eg 16 and 24 Find the highest common factor of two numbers, eg 36 and 27 Investigate problems such as: Age 11-12 Write a number in each circle so that the number in each square equals the product of the two numbers on either side of it. Product puzzle 1 numbers up to 12 Product puzzle 2 numbers up to 20