Subtraction doesn't have to be difficult, but it can be simple. This method is suitable for preschool and first-grade children. For example: 24-8= 16

You can think of it this way: borrow 14-8, first use 10-8=2, then use 2+4=6, and the difference must be 6 or 10, which is simple. That is to say, after borrowing a seat, first reduce the removed digits, and then add the reduced digits to the reduced digits, so that ten digits are not difficult.

However, the premise is that the minuend bit must be less than the minuend [1] bit to simplify.

Subtraction formula table

10- 1=9

10-2=8 9- 1=8

10-3=7 9-2=7 8- 1=7

10-4=6 9-3=6 8-2=6 7- 1=6

10-5=5 9-4=5 8-3=5 7-2=5 6- 1=5

10-6=4 9-5=4 8-4=4 7-3=4 6-2=4 5- 1=4

10-7=3 9-6=3 8-5=3 7-4=3 6-3=3 5-2=3 4- 1=3

10-8=2 9-7=2 8-6=2 7-5=2 6-4=2 5-3=2 4-2=2 3- 1=2

10-9= 1 9-8= 1 8-7= 1 7-6= 1 6-5= 1 5-4= 1 4-3= 1 3-2= 1 2- 1= 1