Adding Decimals
What is 7.42+ 8.5
15.92
Explanation - Are you sure you lined up the decimals?
Check for silly mistakes!
Are you sure you added the zero at the end of 5 in 8.5 to make 8.50?
73.77 - 12.63
61.14
Are you sure you lined the decimals correctly?
Silly mistakes? CHECK!!!
Did you add the zeros (If necessary)
63.9 x 7.0
447.3
Are you sure you lined the decimals correctly?
Silly mistakes? CHECK!!!
Did you add the zeros (If necessary)
Did you add the second column?
9.2 ÷ 5
1.85
Are you sure you lined the decimals correctly?
Silly mistakes? CHECK!!!
Did you add the zeros (If necessary)?
Mr. Smith is building a bench and needs 6 lengths of wood that each measure 1.4 meters. How many meters of wood does he need to purchase?
The correct answer is 8.4 meters.
Explanation - So, Mr. Smith needed 6 lengths of wood, which EACH measure 1.4 meters. So to find how many meters of wood he needs to get, the only logical thing to do is multiply, because he needs the total.
What is 2.475 + 9.56?
12.035
Are you making sure to add zeros?
Are you lining up the decimal in the new answer properly?
3.7 - 1.2
2.5
Are you sure you lined the decimals correctly?
Silly mistakes? CHECK!!!
Did you add the zeros (If necessary)
44.84 x 9.84
441.2256
Are you sure you lined the decimals correctly?
Silly mistakes? CHECK!!!
Did you add the zeros (If necessary)
Did you add the second column?
0.5568 ÷ 0.58
0.96
Are you sure you lined the decimals correctly?
Silly mistakes? CHECK!!!
Did you add the zeros (If necessary)?
Vanessa downloaded two apps which were 17.73 kb total. If one app was 8.63 kb, how big was the other app?
9.1 kb
Explanation - In order to find out the other missing value, you have to subtract. 17.73 - 8.63 will give you the missing value.
1.33 + 9.41
10.74
Are you sure you lined the decimals correctly?
Silly mistakes? CHECK!!!
Did you add the zeros (If necessary)
1.1 - 0.5
0.6
Are you sure you lined the decimals correctly?
Silly mistakes? CHECK!!!
Did you add the zeros (If necessary)
88.6 x 5.01
443.886
Are you sure you lined the decimals correctly?
Silly mistakes? CHECK!!!
Did you add the zeros (If necessary)
Did you add the second column?
1.5 ÷ 2.5
0.6
Are you sure you lined the decimals correctly?
Silly mistakes? CHECK!!!
Did you add the zeros (If necessary)?
Adeline has to read a 128.5 page book in 4.5 days. If she wants to pace herself to finish on time, how many pages does she need to read each day to finish the book in 4.5 days?
28.5
Explanation - In this problem, we are finding out how many pages Adeline reads EACH day. To find out how many pages she reads each day, you have to divide 128.5 by 4.5.
7.08 + 9.23
16.31
Are you sure you lined the decimals correctly?
Silly mistakes? CHECK!!!
Did you add the zeros (If necessary)
405.0 - 1.4
403.6
Are you sure you lined the decimals correctly?
Silly mistakes? CHECK!!!
Did you add the zeros (If necessary)
39.6 x 5.20
205.92
Are you sure you lined the decimals correctly?
Silly mistakes? CHECK!!!
Did you add the zeros (If necessary)
Did you add the second column?
0.295 ÷ 0.59
0.5
Are you sure you lined the decimals correctly?
Silly mistakes? CHECK!!!
Did you add the zeros (If necessary)?
Charlotte is making pies for her whole family. So far, she has made 5.04 pounds worth of pie and has 7 people to feed, including herself. How much does each person get if Charlotte is finished making pies?
0.72
Explanation - Charlotte has a family of 7, including herself. She has made 5.04 pounds worth of pie. Ask yourself: How much pie will each person get? You will have to divide to find the missing product. The equation is 5.04 divided by 7.
44.84 + 44.8
89.64
Are you sure you lined the decimals correctly?
Silly mistakes? CHECK!!!
Did you add the zeros (If necessary)
2636.000 - 372.066
2263.934
Are you sure you lined the decimals correctly?
Silly mistakes? CHECK!!!
Did you add the zeros (If necessary)
28.15 x 5.5
154.825
Are you sure you lined the decimals correctly?
Silly mistakes? CHECK!!!
Did you add the zeros (If necessary)
Did you add the second column?
0.801 ÷ 0.9
0.89
Are you sure you lined the decimals correctly?
Silly mistakes? CHECK!!!
Did you add the zeros (If necessary)?
John wants to buy a watermelon that weighs about 5.7 pounds. The watermelon is priced at $1.58 per pound. How much is the total cost of the watermelon?
9.006
Explanation - You have to multiply to find the missing product.