The purpose of this blog is to provide math games, activities and tasks for you to try at home. Have some math fun!
Tuesday, April 7, 2020
Day 11- Broken Calculator
My Calculator is Broken!
www.Mathforlove.com
I can't use the buttons that are red but I want to reach the goal number. Can you help me?
How many different equations can you write? Write them in the comment box below.
Jack, if you are looking at calculator three, the goal is to make equations that equal 12 without using the buttons for 1, 2, 3 , + or -. Give it a try!
Celcelia, thanks for commenting. Check the directions on this activity. Choose a calculator and try to make equations that equal the goal number. But be careful, some of the keys are broken, so you can't use those.
That's a lot of great equations. For calculator two, the goal is to have all of your equations equal 33 without using the buttons for 3, 4 or +. Give it a try!
Everything in the brackets equals 3. How could you change what is outside the brackets on the left to make this work. Remember: solve what is in the innermost parentheses or brackets first, then work left to right.
Sahen, thanks for checking out the math blog. Looks like you are working with the last calculator to try to get to 12. Notice some of the keys are broken, so you can't use the buttons for 1,2,3, - or +. You can do it!
8/4*6=12
ReplyDeleteGreat idea! Do you think there are more ways?
DeleteEmma Percoskie from FW 2nd grade says:
ReplyDelete7 x 6= 42 - 9 = 33
8 x 5 = 40 - 7 =33
7 x 5 = 35 - 2 = 33
This was a challenge for her without the + sign :)
Wow Emma! You thought of 3 ways and used multiplication in second grade! Way to go!
ReplyDeleteCameron came up with the following equations:
ReplyDelete55 - 22 = 33
88 - 55 = 33
66 - 22 - 11 = 33
6 x 7 - 9 = 33
99 - 66 = 33
100 - 67 = 33
111 - 78 = 33
Wow! Nice job, Cameron!
DeleteThis comment has been removed by the author.
ReplyDeleteThat's a lot of ways to make 12! Don't forget for this calculator the buttons for 1, 2 and 3 are broken, so you cant' use those.
Deleteyou could do the fact 84 divided by 7 is 12
ReplyDeleteNice thinking! Is there any way to get to 84 without just using the numbers 8 and 4?
DeleteYes, you could! Nice work! Can you think of another?
Delete4x5=20
ReplyDelete20-8=12
Jack, if you are looking at calculator three, the goal is to make equations that equal 12 without using the buttons for 1, 2, 3 , + or -. Give it a try!
Delete84/7=12
ReplyDelete96/8=12
48/4=12
567/48=12
948/79=12
Nice thinking with the three digit numbers! Did you use rounding with them?
Delete88-55=33, 99-66=33, 55-22=33, 121-88=33, 17x2=34-1=33, 155-122=33,
ReplyDelete144-111=33, 188-155=33, 185-152=33, 111-78=33
Well done, Akshara!
DeleteCecelia- 4&5 9x6, 9x8, 9x5, 9x7, 9x4, 9x9, 8x4, 8x7, 8x5, 8x6, 8x8, 7x9
ReplyDeleteCelcelia, thanks for commenting. Check the directions on this activity. Choose a calculator and try to make equations that equal the goal number. But be careful, some of the keys are broken, so you can't use those.
DeleteGabby S. came up with these equations...this was a fun game!
ReplyDelete15+18=33
11+22=33
12+21=33
26+7=33
21+12=33
99-66=33
89-56=33
59-26=33
58-25=33
Glad you like the activity, Gabby! Did you notice the plus sign wasn't working? Maybe that would change some of your answers! :)
DeleteValerie 2do grade Memorial School.
ReplyDeleteGOAL:33
6-1=5
9-1=8
8-1=7
9-2=7
8-2=6
5x1=5
9x1=9
6x1=6
8x1=8
7x1=7
1x1=1
2x1=2
2x6=12
5x5=25
That's a lot of great equations. For calculator two, the goal is to have all of your equations equal 33 without using the buttons for 3, 4 or +. Give it a try!
ReplyDeleteTook me 20 mins. to figure out this one for the last calculator;
ReplyDelete9 times 4 divided by {[(8 times 4 divided by 6) times 5] divided by 9}
~Arran Fitzgerald, 5th Grade
Arran, I admire your persistence and willingness to challenge yourself. If you start with the innermost parentheses, what is 8 times 4 divided by 6?
ReplyDelete8 times 4 *32* divided by 6 *5.4*
DeleteIs it exactly 5.4?
Delete9 x 9 / {[9 x 9 x (8 / 4)] / 6 / 9 } = 12
ReplyDeleteEverything in the brackets equals 3. How could you change what is outside the brackets on the left to make this work. Remember: solve what is in the innermost parentheses or brackets first, then work left to right.
ReplyDeleteOh wait...
ReplyDeleteI made a typo
9 x 4 / {[9 x 9 x (8 / 4)] / 6 / 9} = 12
8 / 4 = 2
9 x 9 x 2 = 162
162 / 6 = 27
27 / 9 = 3
36 / 3 = 12
There you go! That's great! I hope you liked this challenge!
Delete1-8x6=48
ReplyDelete48/4=12.
2-(8/4)x6=12.
3-9x8=72
72/6=12
Sahen, thanks for checking out the math blog. Looks like you are working with the last calculator to try to get to 12. Notice some of the keys are broken, so you can't use the buttons for 1,2,3, - or +. You can do it!
ReplyDelete