What's the Difference?
In this finding the difference in sums activity, 1st graders look over two boxes of numbers and circle the pairs of numbers in each box that have a difference of 9 in the first one and 6 in the second one.
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Grade 1 Supplement Set A3 - Number & Operations: Addition & Subtraction on the Number Line
Hop your way through a mathematical equation with your first grade class as they learn the idea of moving up and down the number line. Adding and subtracting like little frogs is an engaging and clever way to teach/reinforce this concept.
K - 2nd Math CCSS: Adaptable
Word Problems Involving Subtraction
A classic math lesson like this one involves a warm up, guided practice, application, and assessment. Get those 2nd graders good at assessing and solving single-step word problems through basic addition and subtraction drills, a review...
1st - 2nd Math CCSS: Adaptable