第九课：Multi-digit Subtraction多位数相减
Today we’re going to learn how to do multi-digit subtraction.
It’s similar to doing multi-digit addition like we learn in the last video. But there’s a few important differences. The main difference with subtraction is that the order of problem matters.
With addition,you can switch the order of the numbers you’re adding and you still get the same answer. With multi-digit subtraction,it’s important to remember that Order Matters,especially when you rewrite your problem.
Often you’ll be given a problem like this:38-25.
And you have to rewrite it with the numbers stacked up like we did with addtion. You have to make sure that the first number,the one you taking frome goes on top and the number you’re taking away is on the bottom.
