These subtraction problems are used with the Base 10 Blocks. The colors of the numerals are the colors that are used with the Montessori Method. The numeral in the one's position is green. The numeral in the ten's position is blue. The numeral in the hundreds is red and in the thousands position, the numeral is green again.

There are 171 different subtraction problems that can be used with the Base 10 Blocks. There are 36 different subtraction problems that don't use borrowing. Another 36 that the student must borrow from the tens to the one's spot. There are also 36 problems that regroup from 100s to 10's and another 36 problems that regroup from 1000's to 100's. There is also a mixture of subtraction problems. Normally I only give 2 math problems a day