Curated OER
Together Forever
In this transposing digits worksheet, students solve and complete 5 different addition problems. First, they transpose the letters to digits in each addition problem listed. Then, students determine which of the five possible answers...
NumberNut
Number Nut: Addition: 2 Digit Numbers
Learn how to add double-digit numbers in this lesson complete with examples, rules, and vocabulary.
NumberNut
Number Nut: Subtraction: 3 Digit Numbers
A brief lesson on subtracting from three-digit numbers that includes detailed examples, rules, and further explanation of borrowing.
Math Is Fun
Math Is Fun: Place Value
Find out what the "tens" and "hundreds" columns are and how they can help you understand a numbers place value. Learn what each digit of a number stands for with the help of charts used at this MathsIsFun resource.