Khan Academy Static

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.

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74_Adding_2_digit_numbers_without_regrouping_1.html

76_Breaking_apart_2_digit_addition_problems.html

78_Adding_by_making_a_group_of_10.html

77_Regrouping_to_add_1_digit_number.html