Tuesday, 25 October 2016

An even more challenging challenge for Willow maths set!

After focusing on rounding to the nearest 10, 100 and 1000 in class, let's see who can still do this whilst at home.

An easy challenge to start with...
Can you round the following numbers to the nearest 10, 100 and 1000?

1.) 789             t = _____          h = _____          th = _____

2.) 3671           t = _____          h = _____          th = _____

3.) 78345          t = _____          h = _____          th = _____

4.) 23919          t = _____          h = _____          th = _____

5.) 19871          t = _____          h = _____          th = _____


Now for the even more challenging challenge...
Use the clues below to find the correct answer from the eight possibilities. Remember, there should only be one answer!

Challenge A
I am a 3 digit number
My tens digit is odd, but I am even.
If you round me to the nearest 10, I round up.
I am 700 rounded to the nearest 100. 

558          1238        678          9081

238          652         732           1098

Challenge B
I am a 4 digit number.
My hundreds digit is even.
My tens digit it a multiple of 3.
I am 3000 when rounded to the nearest 1000.

2871          289          3462          9765

999           3333         102           5

Challenge C
I am a 3 digit number. 
When rounded to the nearest thousand I am 1000.
My ones digit is a multiple of 2.
My tens digit is a multiple of 3.

997          1002          567        678

1090          998          431        239

Finally, the most challenging challenge...
Can you create your own rounding challenge cards for me to solve when we return back to school? I wonder who will catch me out...






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