Subtraction Magic Trick!
By Clara L and Matthew K
In Mathematics in Year 5, we are learning about Addition and Subtraction. In Subtraction, Miss Lee showed us a very smart subtraction trick. This trick is for subtraction sums with lots of zeroes and it must end with a zero. These are the steps to a subtraction trick that will make you extremely smart! There will also be an example.
Step 1: Write the problem. 9, 000, 000
- 874, 392 = ?
Step 2: Take away 1 from the first number. 8, 999, 999
- 874, 392 =?
Step 3: Figure out the problem. 8, 999, 999
- 874, 392
________
8, 125, 607
Final Step: Plus the 1 that you took away on the 2nd step. 8, 125, 607 +1= 8, 125, 608
So, you can do a sum with 50 zeroes and get the answer right!