It looks different, but it still has two parts ... Just like with addition, we can use a part-whole model to help partition larger numbers to make them easier to deal with in subtraction problems.

You can see from the calculation that only the hundreds digit has changed. You don't need to draw out a place value grid each time you want to do an efficient addition or subtraction. Think about ...

yielding 4×4=16 and 4×2=8. After these operations, our equation appears as: 46+16-8=?. After carrying out the addition and subtraction, our final result is indeed 54. Read also: Primary school ...