American Museum of Natural History
A Kid's Guide to Stargazing
Get kids interested in stargazing with a step-by-step guide. The guide begins with the do's and don'ts, what the defines a star, and introduces a journal. The page is linked to see stars if light pollution keeps stars away in your area.
NumberNut
Number Nut: Subtraction: 1 to 10
Subtraction is about taking things away. Learn how to set up the problem and work with single-digits to 10. Then practice the skills with the two interactive subtraction activities.
NumberNut
Number Nut: Subtraction: Borrowing
Sometimes you need to borrow when subtracting. This lesson takes you through the steps. Then practice the skills with the interactive activities using two and three-digit subtraction with borrowing.
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.
Mr. Martini's Classroom
Mr. Martini's Classroom: Subtraction Using Borrowing
Students subtract one-digit numbers from two-digit numbers using borrowing on these interactive flashcards.
NumberNut
Number Nut: Subtraction: Borrowing
Explains the concept of 'borrowing' in subtraction, also known as regrouping or decomposing numbers.
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