Quiz: Subtraction to 20 Take this quiz to see how much you know about this topic already, then work through the guide and see if you can beat your score.

Doing quick calculations without writing anything down can seem tricky, but with the right mental math techniques, students ...

Practice adding and subtracting within 20 using a Double 10-frame & number line. Represent a teen number using a number bond to solve a Mystery Math Mistake. Use Notice and Wonder with a marble ...

Math Mights Subtraction Strategies Season 2 Episode 208 | 15m 59s | CC Count back & use the relationship between addition and subtraction to subtract within 20. Aired 12/07/2021 | Rating TV-Y ...

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.