Mental Math: Add Tens Practice 10.1
In this adding tens activity, students solve 11 problems in which tens are added. Students may use a basic fact to help. Example: 2 tens + 1 ten.
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Adding/Subtracting Whole Numbers in Your Head
Exercise those mental math muscles! This worksheet contains 10 addition and 10 subtraction problems which require learners to compute sums or differences in their heads. A quick review at the top of the page provides a strategy based on...
2nd - 3rd Math CCSS: Adaptable
Mental Math: Subtract Tens - Homework 12.1
Now that your class can add by 10s they can start subtracting by 10s. This clear, learner-friendly learning exercise provides a good example (10-rods are pictured) and 7 problems to solve. Relates groups of tens to single-digit numbers,...
1st - 3rd Math CCSS: Adaptable