Curated OER
Basic Subtraction
In this subtraction worksheet, students practice their subtracting skills. Students solve twenty simple one and two- digit problems.
Khan Academy
Khan Academy: Add and Subtract Within 100 Word Problems 3
Practice solving word problems with addition and subtraction. These questions are start unknown problems including add to and take from problems. Numbers used are 100 or less. Students receive immediate feedback and have the opportunity...
Khan Academy
Khan Academy: Find the Missing Number (Add and Subtract Within 100)
Practice solving problems like "___ - 45 = 27" where you have to figure out the missing value in an addition or subtraction equation. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video...
Khan Academy
Khan Academy: Time Differences
In this exercise, students practice determinging time differences. Students receive immediate feedback and have the opportunity to get step-by-step hints and try questions repeatedly. CCSS.Math.Content.3.MD.A.1 Tell and write time to the...