Add and subtract within 100 using compose, decompose, and place value strategies. Engage with a number talk to sum near-doubles using compensation. Add and subtract within 100 in more than one way.

Subtract within 1000 using various representations, strategies, and algorithms. Warm up with a Mystery Math Mistake to find a mistake made in using an algorithm for addition and subtraction. Subtract ...

The calculator on your Apple devices can do more than add, subtract, multiply and divide. Here's how it can help you with all ...

To sum and subtract in Google Sheets, use the formula =SUM(x:y) or =MINUS(x,y) in the desired cells and input the relevant values. Press Enter to get the results. Adding up columns or rows of numbers ...

Math is currently being taught in a way most people over the age of 30 may not understand. It doesn’t take anything more than a multi-step subtraction problem to result in a wide spectrum of reactions ...