Slide 1

Slide 2 Subtraction Review Press Here Slide 3 Directions Read through each of the slides. Follow the directions that are given. Use paper and pencil to solve each math problem. When you are finished please click on the at the bottom of the screen. Keep an open mind. Have Fun!! Slide 4 Supplies You will need: Paper Pencil Before you get started activate your brain buttons! Slide 5 Lesson When subtracting 2 digit numbers there are some tips that you need to remember. Please click on the video below (white box) for a quick review of 2 digit subtraction. It will remind you when you need to regroup and when not to. Slide 6 You Try It!! 87A. 43 -34 121 C. 53 Please use a paper and pencil to solve the subtraction below. Once you are done please click on the box next to the right answer. Remember, you want to start in the 1s column first and check to see if you need to regroup. Slide 7 Great Job!!! Way to Go!! I Knew You Could Do It!!! 53 is correct. 7-4 =3 and 8-3=5 There was no need to regroup. Slide 8 You chose 43, nice try but the answer is incorrect. Look at your basic fact subtraction. Did you start in the 1s column 7-4=? And then the 10s:8-3=? Go back and try again. I know you can do it!!! Slide 9 You chose 121, nice try but the answer is incorrect. Look at the sign. Did you accidentally add instead of subtract? Go back and try again. I know you can do it!!! Slide 10 Lets try another!! Remember you always have to start in the ones column to see if you need to regroup. 47 08 -39 12 18 Slide 11 You chose 12, nice try but the answer is incorrect. Look at your 1s column, is there more on the floorthen you need to go next door and borrow a 10. Go back and try it again. I know you can do it!!! Slide 12 Great Job!!! Way to Go!! I Knew You Could Do It!!! 08 is correct. 3 17 4 7 - 3 9 0 8 Since you started in the 1s column you found that there was more on the floor so you had to go next door and borrow from the 10s. Slide 13 You chose 121, nice try but the answer is incorrect. Look at the sign. Did you accidentally add instead of subtract? Go back and try again. I know you can do it!!! Slide 14 Lets try another!! Remember you always have to start in the ones column to see if you have to regroup. 62 33 -28 44 34 Slide 15 You chose 33, nice try but the answer is incorrect. Look at your basic fact subtraction 12-8=? Go back and try again. I know you can do it!!! Slide 16 You chose 44, nice try but the answer is incorrect. Check your 10s column did you take one away from the top and forget to change the top number? Go back and try again. I know you can figure it out!!! Slide 17 Great Job!!! Way to Go!! I Knew You Could Do It!!! 08 is correct. 5 12 6 7 - 2 8 3 4 Since you started in the 1s column you found that there was more on the floor so you had to go next door and borrow from the 10s. Slide 18 Lets try another!! Remember if there is more on the floor you have to go next door and regroup. 94 43 -57 37 151 Slide 19 You chose 43, nice try but the answer is incorrect.. Check your 10s column did you take one away from the top and forget to change the top number? Go back and try again. I know you can do!!! Slide 20 Great Job!!! Way to Go!! I Knew You Could Do It!!! 08 is correct. 8 14 9 4 - 5 7 3 7 Since you started in the 1s column you found that there was more on the floor so you had to go next door and borrow from the 10s. Slide 21 You chose 151, nice try but the answer is incorrect. Look at the sign. Did you accidentally add instead of subtract? Go back and try again. I know you can do!!! Slide 22 Lets try another!! 65A. 22 -43 24 C. 108 Remember you have to check to see if you need to regroup. You might not have to regroup on every subtraction problem. Slide 23 Great Job!!! Way to Go!! I Knew You Could Do It!!! 22 is correct. 5-3 =2 and 6-4=2 There was no need to regroup. Slide 24 You chose 24, nice try but the answer is incorrect. Look at your basic fact subtraction. Did you start in the 1s column 7- 4=? And then the 10s 6-4=? Go back and try again. I know you can do it!!! Slide 25 You chose 108, nice try but the answer is incorrect. Look at the sign. Did you accidentally add instead of subtract? Go back and try again. I know you can do it!!! Slide 26 Congratulations! You have finished the subtraction review. Please quietly join the rest of the class.