Maths Magic

20/09/2019

The children have been using a bit of hokus pokus in Maths lessons this week and learning Maths Magic tricks as part of Whole School Maths Magic Week. Have a go and see how you get on.

Think of a number - the magic of algebra:

Think of a number, subtract 2, multiply by 3, add 9, divide by 3, subtract the number you first thought of and you will always end up with 1.

That’s algebra for you !

The 11 times table: To multiply by a 2-digit number add the two digits and place the sum in between.

25 x 11 = 275 

31 x 11 = 341 

57 x 11 = 627 <-- you need to carry the 1!

Percentages:

You can always switch percentages around to make the calculation easier.

44% of 50 is the same as 50% of 44 = 22

40% of 75 is the same as 75% of 40 = 30 

Good luck!