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Mental and oral starters

Mental and oral starters. Brain bubbles. 7 x 8 = 56. Some possibilities. 5600  800 = 7. 8 x 7 = 56. 3 1 / 2 x 16 14 x 4 = 56 28 x 2 = 56. 56  8 = 7 56  7 = 8. 7 x 8 = 56. 1 / 7 of 56 = 8 1 / 8 of 56 = 7. 0.7 x 8 = 5.6 0.8 x 7 = 5.6. 70 x 8 = 560 80 x 7 = 560 etc.

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Mental and oral starters

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  1. Mental and oral starters

  2. Brain bubbles 7 x 8 = 56

  3. Some possibilities 5600  800 = 7 8 x 7 = 56 31/2 x 16 14 x 4 = 56 28 x 2 = 56 56  8 = 7 56  7 = 8 7 x 8 = 56 1/7 of 56 = 8 1/8 of 56 = 7 0.7 x 8 = 5.6 0.8 x 7 = 5.6 70 x 8 = 560 80 x 7 = 560 etc

  4. Brain bubbles 3 x 64 = 192

  5. Brain bubbles 20% is 10% is £40

  6. Brain bubbles 0.4 is £60

  7. Brain bubbles ⅛ is £25

  8. 7 X 100 = 7 X 80 = 7 X 40 = 7 X 5 = 7 X 40 = 7 7 X 20 = 7 X 1000 = 7 X 10 = 7 X 9 =

  9. 46 x 100 4600 ÷ x 100 460 46 x 0.046 x 460 ÷ 100 4.6 x x 10 4.6 ÷ 10 0.46 x

  10. Counting stick for percentages £20 80% 0% 100% What is 40%?, 20%?, 10%?, 100%?

  11. I like

  12. Multiplying multiples of 20 Throw a dice, multiply the score by one of the numbers below. Cover the number you make. "Four in a Line" to win.

  13. How many angles or sides.

  14. Shape Cards for "Four in a Line". These cards can be used in conjunction with the previous grid. Players take turns in turning a card and cover that shape. This helps shape recognition and could be played with irregular shapes as well.

  15. Quadrilateral "Four in a Line"

  16. Four in a line - Decimal Dice A game for 2 teams. Take turns to roll a dice and decide whether to multiply or divide the number on the dice by 10, 100 or 1000 to make one of the numbers on the grid. That number is then shaded or covered with that team’s colour. The winning team is the first to make a line of four.

  17. Sorting activities

  18. Can you fill in the labels for the cells?

  19. What’s next? 210 120 336 Each of these three numbers is both the sum and the product of three consecutive numbers . What is the next number in this sequence?

  20. 6 2 4 3 - - = 0 Choose any 3 of the 4 digits above to complete these statements What other numbers can you obtain? Can you make negative numbers? + - = 1 + - = 3 + - = 4 - + = 5 + - = 7

  21. A four figure number When a certain four-digit number is multiplied by 4, its digits appear in reverse order. It also has both of the following properties Its first digit is a quarter of the last one Its second digit is one less than the first What number must it be?

  22. Prime products? 143 35 15 323 437 899 Each of these 6 numbers is the product of two primes. Which is the odd one out and why?

  23. Make 5 numbers 7 0 9 1 6 2 4 8 5 3 • Each time use all of the ten cards above • Arrange the cards to make: • Five numbers that are multiples of 3 • Five numbers that are multiples of 7 • Five prime numbers • Make up some more problems of your own

  24. Digit arrangements Using all of the 5 digits once for each statement, make the best numbers you can to fit the statements below (some may be impossible) Digits to use

  25. Target Calculation + Throw one dice or turning a 0-9 card put the numbers to the left of the equals sign so that the answer is a two digit number. Can you get as near to 50 as possible.

  26. Target Calculations Get an answer as near to 1000 as possible. X = Get as large answer as you can + + = Get a number between 0 and 200 = A huge range of tasks can be put into this sort of activity. They can be used as shared puzzles or games.

  27. TARGET CALCULATIONS

  28. Decimal target board 1

  29. Decimal target board 2

  30. Decimal target boards Point to a number e.g. 64.5 What do you need to add to this number to make the next 100 Choose target total of 1000 Round numbers to nearest 100 etc

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