Think of a Number!

Here is your mental maths homework for the week beginning 7th November.  Remember to add your answer as a comment.  Thanks.

  1. I think of a number.  I multiply it by 2, add 50 and my answer is 74.  What was my number?
  2. I think of a number.  I add 16, subtract 30 and my answer is 36.  What was my number?
  3. I think of a number.  I subtract 25 and add 2.  I then multiply by 2.  My answer is 154, what was my number?

Now write your own “I think of a number word problem” and explanation of how to work it out.

19 thoughts on “Think of a Number!

  1. 1) your number is 12.
    2)your number is 50.
    3)your number is 100.
    I THINK OF A NUMBER I ADD 75 SUBTRACT 50 AND MULTIPLY IT BY 2.MY ANSWER IS 100,WHAT WAS MY NUMBER.

  2. 1) 12

    2) 50

    3) 100

    I have a number. Multiply it by 2. And subtract 7. The answer is
    15. What is my number?

  3. Q1 – 12
    Q2 – 50
    Q3 – 100

    My number word problem is ;

    I think of a number, I add 3, times it by 5, and divide it by 2, My answer is 25

    By Mason Murray 😀 

  4. answer to number 1 is 12 because x 2 is 24 and 24 add 50 is 74.

    I think of a number minus 22 then add 9. The multiply by 8 and my answer is 296, what was my number?

    Rachael

  5. (1) 12
    (2) 50
    (3) 100

    (4) 88 Drew\’s answer.

    I think of a number.I add 12.I subtract 16.My answer is 62.
    What is my number?

  6. 1a)12
    1b)50
    1c)100

    I think of a number multiply it by 5 add it by 5 whats my answer……

    drew’s answer 88

    thanks for reading 😀

  7. Great work as usual Primary 7! We will spend a bit of time in class discussing the answers and we will try to solve some of the examples that you have all given.

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