Mental Math: Add Hundreds - Reteach 21.1
Build mental math skills and solid number sense with this worksheet. The class is asked to think of 200+500 as 2+5. There is a review and 6 problems to solve. 3+4!, I can do that in my head!
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Mental Math: Subtract Hundreds - Problem Solving 22.1
Four word problems are presented to second graders. For each, they can use their mental math skills to quickly subtract hundreds and arrive at an answer. This is a terrific inclusion for your Common Core math curriculum.
1st - 3rd Math CCSS: Adaptable
Adding/Subtracting Whole Numbers in Your Head
Exercise those mental math muscles! This activity 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: Add Hundreds Problem Solving 21.1
Use these word problems to reinforce the concept of adding hundreds. Budding mathematicians read each of the 4 word problems, then use the provided space to draw or explain how they computed an answer. Note: Be aware some kids who will...
2nd - 3rd Math