Addition_and_subtraction_missing_value_problems
Learn how to solve problems like "___ - 237 = 448" where you don't know one of the values in an addition or subtraction equation.
Intro_to_subtraction_with_2_digit_numbers
Learn how to subtract two-digit numbers. By the end of this tutorial, you'll be able to solve problems like 48-9 and 48-31. More advanced problems like 48-29 will be covered in a future tutorial.
Learn how to make the number 10 from two smaller numbers.
Subtraction_with_regrouping_within_1000
Learn how to subtract numbers like 363 - 259. These subtraction problems are a harder than the ones we've done before because they require regrouping (also called borrowing).
Strategies_for_adding_and_subtracting_within_100
Learn strategies for adding and subtracting 2-digit numbers.
Learn how to solve addition and subtraction word problems. Numbers used 100 or less.
Learn how to solve addition problems by adding ones, tens, and hundreds.
Addition_and_subtraction_word_problems_within_10
Learn how to solve addition and subtraction word problems with small numbers. Numbers used are 10 or less.
Learn to subtract two-digit numbers like 47 and 39.
Intro_to_addition_with_2_digit_numbers
Learn how to add two-digit numbers. By the end of this tutorial, you'll be able to solve problems like 48+6 and 48+21. More advanced problems like 48+28 will be covered in a future tutorial.
Word_problems_with_more_and_fewer_
Learn how to solve word problems that use the words "more" and "fewer". Numbers used are 20 or less.
Addition_and_subtraction_greater_than_1000
Learn strategies for adding and subtracting numbers greater than 1000.
Addition_with_regrouping_within_1000
Learn how to add numbers like 259 + 363. These addition problems are a harder than the ones we've done before because they require regrouping (also called carrying).
Addition_and_subtraction_within_20
Add and subtract numbers 20 or less. Find the missing number in addition and subtraction equations.
Learn how to solve addition problems by adding ones, tens, and hundreds.
Basic_addition_and_subtraction
Adding and subtracting is the basis of all mathematics. This tutorial introduces you to one-digit addition and subtraction.
Strategies_for_adding_2_and_3_digit_numbers
Learn strategies for solving addition problems within 1000.
Learn to add two-digit numbers like 37 and 49.
Learn how to solve addition and subtraction word problems. Numbers used are 20 or less.
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