In this addition worksheet, students add two-digit vertical numbers with some regrouping to find the sums. Students solve twelve problems.
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Initial Fraction Ideas Lesson 23: Overview
Celebrate young mathematicians' ability to compare, add, and subtract fractions with this math review lesson. To demonstrate their newly acquired knowledge, children solve a series of fraction word problems, explaining their solutions in...
3rd - 6th Math CCSS: Adaptable
Write and Test Equations with Two Equal Addends to Prove that the Sum will Always be Equal
Will the sum of two even numbers always be even? Discover the answer with the fourth video in this five-part series. Multiple examples are presented, using a combination of number sentences and visual models to help young mathematicians...
5 mins 1st - 3rd Math CCSS: Designed
Write Even Numbers as the Sum of Two Equal Addends
Teach young mathematicians that all even numbers can be written as the sum of two equal addends with the third video in this series. This fact is clearly demonstrated with multiple examples, using number lines and visual models to...
5 mins K - 2nd Math CCSS: Designed
Solve Addition Problems: Using Partial Sums
When learning to add large numbers, having a solid understanding of place value is essential. In the second lesson in this series, young mathematicians see how expanded notation can make addition of three- and four-digit numbers much...
3 mins 2nd - 4th Math CCSS: Designed
Study Jams! Estimate Sums & Differences of Whole Numbers
Estimating is an essential skill used in everyday life. This presentation explains how to apply prior knowledge about rounding numbers to estimating sums and differences. Example problems and assessment include large numbers, making this...
4th - 6th Math CCSS: Adaptable