Home>Whiteboard Worksheets>Mental calculation strategies (x and divide)
 Choose the topic: Please select ..... A: Place value, ordering and rounding B: Properties of numbers & number sequences C: Fractions, decimals & percentages, ratio & proportion D: Mental calculation strategies (+ and -) E: Pencil & paper procedures (+ and -) F: Understanding multiplication & division G: Rapid recall of multiplication & division facts H: Mental calculation strategies (x and divide) I: Pencil & paper procedures (x and divide) J: Using a calculator K: Checking results of calculations L: Solving problems: making decisions M: Reasoning about numbers or shapes N: Problems involving 'real life', money or measures O: Handling data P: Measures Q: Shape and space H: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
 Random number generator: target board A screenshot of the number generator. H1: A flexible whiteboard resource which generates 24 different sets of numbers; similar to a target board. Options include: Times-tables, 2, 3, 4, 5 and 10 : match the pairs Times-tables, all up to 10x10 : match the pairs Doubles : match the pairs Quarters: match the pairs Select the type of numbers to be generated by clicking on the numbered buttons at the top. 5: doubles, 6: quarters, 9: times-tables 1, 10: times-tables 2 The colour of the number can be changed. Select one of 8 colours then click on a number. The numbers can be put arranged in a grid, click this button or arranged randomly, click this button The numbers can be grouped by dragging them about. The numbers can be discarded by dragging them to the bin. Children can use the resource to match pairs: eg 3x5 and 15 (times-tables 1) eg 35 and 70 (doubles) A clock starts when a set of numbers has been generated. The clock can be hidden or shown (click the green clock button). It can be stopped by clicking the 'stop the clock' button! The clock can be used to see who can match the pairs in the quickest time.

 Mental arithmetic Mental arithmetic 'tests' each comprising ten questions on addition, subtraction, multiplication, division, place value, sequences, fractions, measures, time and money. H2: National Curriculum: level 3 'test 1' H3: National Curriculum: level 3 'test 2' : slightly more difficult A mental arithmetic 'test' comprising ten questions on multiplication and division.. H4: National Curriculum: level 3

 SAT-type missing number questions Write in the missing numbers. Addition, multiplication and division of multiples of 10. H5: Missing numbers Circle divisions which have an answer of, for example, 6 remainder 3 H6: Remainders

 Partition and use the distributive law Click underneath the question to reveal the working out. Multiply a number by 9 or 11 by multiplying by 10 and adding or subtracting the number. H7: Multiply by 9 or 11 Multiply a two-digit number by single-digit number, multiplying the tens first. H8: Multiply Multiply a number by 9, 11, 19 or 21 by multiplying by 20 and adding or subtracting the number. H9: Multiply by 9, 11, 19 or 21 Multiply a two-digit number by single-digit number, multiplying the tens first. H10: Multiply eg 9 x 27 = (9 x 20) + (9 x 7) = 180 + 27 = 207 H24: Multiply click on the boxes to reveal each stage of the calculation. Multiply a number by 49, 51, 99 or 101 by multiplying by 50 or 100 and adding or subtracting the number. H11: Multiply by 49, 51, 99 or 101 Multiply a a whole number and tenths by a single-digit number, multiplying the units first: eg 6 x 5.8 = (6 x 5) + (6 x 0.8) = 30 + 4.8 = 34.8 H12: Multiplying decimals

 Multiply or divide mentally Multiply or divide a two-digit multiple of 10 by a three-digit multiple of 100. H13: Multiply Divide a four-digit multiple of 100 by 1000, 100 or 10 H14: Divide H15: Multiply and divide Multiply a decimal fraction with one or two decimal places by 10 or 100. H16: Multiply Divide a one- or two-digit whole number by 100 or 10. H17: Divide H18: Multiply and divide Complete this multiplication table H19: Multiplication table 1 H20: Multiplication table 2 more difficult 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. The first one is done for you. H21: Product puzzle 1 numbers up to 12 H22: Product puzzle 2 numbers up to 20

 Order of Operations

Click below the 'sum' to
show or hide the answer

H23: Order of Operations: BODMAS
Fill in the missing operations and brackets (if necessary) to make the 'sum' correct.

For example :

 3 5 4 = 3
3 x (5 - 4) = 3

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