6 ÷ 2 = 3 Front End Estimation
2.
Estimate 6.6 ÷ 2.3
6 ÷ 2= 3 underestimate
8 ÷ 2= 4 overestimate
3. [C] 25.73 [÷] 3.1 [=] 8.3
-Estimate then use a calculator
4. Divide 20.4 ÷ 3
- Divide as whole numbers then estimate as decimal.
5. Without calulating the answer, place the decimal point in the correct position. Show the estimate that helped you place the deciaml point.
a) 82.4 ÷ 20 = 4.12
-80 ÷ 20 = 4
b) 3.12 ÷ 0.6 = 5.2
3 ÷ 0.5 = 6
c) 2.132 ÷ 0.4 = 5 .33
3 ÷ 0.5 = 6
d) 27 ÷ 0.45 + 60.00
30 ÷ 0.50 = 60
e) 4.026 ÷ 0.6 = 6.71
4 ÷ 0.5 = 8
f) 33.12 ÷ 6.9 = 4.8
30 ÷ 5 = 6
6. Estimate each answer and show your thinking. Then, use a calculator to determine each asnwer.
a) 5.24 ÷ 0.5 = 10.48
Estimate: 5 ÷ 0.5 = 10
b) 68.22 ÷ 0.6 = 113.7
Estimate: 50 ÷ 0.5 = 100
c) 2.142 ÷ 0.07 = 30.6
Estimate: 2 ÷ 0.07 = 28
d) 111.6 ÷ 4 = 27.9
Estimate: 100 ÷ 4 = 25
7. What is the cost of each purchase before tax? Show your calculations.
a) 3 oatmeal barsfor $7.50
$7.50 ÷ 3 = $2.50
b) 5 cans of tuna for $5.30
$ 5.30 ÷ 5= $1.06
c) 6 lemons for $2.99
$3.00 ÷ 6 = $ 0.50
8. George has $10.50 to spend on energy bars. HOw amny can he buy if they cost $0.70 each, including tax?
$10.50 ÷ $0.70 = $15.00
George can buy 15 enrgy bars.
9. Carmen earns $8.30 per hour. She wants to buy a jacket that cost $124.50. How many hours will she have to work to have enoguh money to buy the jacket? Estimate, then use a claculator to determine the asnwer.
125 ÷ 10 = 12.5 - estimated
124.50 ÷ 8.30 = 15- calculated
10. withought calculating the asnwer, circle the larger value . Explain your thinking.
a) 7.8 ÷ 0.98 or 7.8 ÷ 1. 1 is larger than 0.98
b) 16 ÷ 0.5 or 25. 16 ÷ 0.5 = 32
c) 1500 or 2 ÷ 0.001. 2 ÷ 0.001 = 2000
d) 9.3 ÷ 1.02 or 9.3. 9.3 ÷ 1.02 = 91
e) 536 ÷ 0.72 or 536 ÷ 0.68. 0.72 is larger than 0.68
15 comments:
good job i can tell you worked really hard on this..Next time try to find a video from youtube
Great job Caleb! You did a really good job on explaining each answer.
good job next time maybe you could add a picture I like how at the end you made it colorful
good job but maybe you could you could of added a video but I like it
good job ! it really helped me !
good job caleb! but i think it will help if there was a video
good job caleb !! maybe next time you should add a video.
good job! i like the way you did it and explained it, very good job!!!
good job Caleb but try to add a viedo but good job
good job! i liked how you explained it ... but next time try to add a vidio ..and maybe apicture.
Good job Caleb you explained everything very easy to understand. You could of added a link. But anyways you did a great job.
Good job Caleb!Although it could have helped people more if you added a video.
good job Caleb. I liked how you explained it.
Good job! I liked how you explained the answers. But next time you should add a video and a link and maybe a picture so I can understand it a little better!
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