Adding and Subtracting Two Digit Numbers
In this math activity, 2nd graders find the sums and differences in 19 two digit addition and subtraction problems. They color the spaceship picture using the color associated with answers such as coloring the answers between 20 and 30 using red.
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Add Up To Four 2-Digit Numbers by Using Addition Facts and Friendly Numbers
Learning to recognize friendly numbers is a big step in developing fluency with addition. Looking at multiple real world examples, the instructor models how to rearrange addition number sentences and use friendly numbers to quickly and...
5 mins 1st - 3rd Math CCSS: Designed