Mathematics, 16.11.2020 18:10 AWESOMEMIHI
Andrew was making a science project for school. He worked for 6.6 hours the first week, 2.75 hours the second week, and 4.4 hours the third week.
Andrew used the following mental math strategy to find the total number of hours he worked on his project.
6
.
6
+
2
.
75
+
4
.
4
(
6
.
6
+
4
.
4
)
+
2
.
75
11
+
2
.
75
=
13
.
75
What is the reason for his strategy?
A.
It is easier to add decimals in a decreasing order than in a mixed order.
B.
6.6 and 4.4 are compatible numbers that are easy to add mentally.
C.
It is easier to add decimals with the same number of place values after the decimal point than adding decimals with different numbers of place values after the decimal point..
D.
Rounding removes the decimals and creates whole numbers.
Answers: 3
Mathematics, 21.06.2019 17:00
Which simplifys to a+ b? a-(1-b)+1 -(1-a)-b+1 (a--1) -1)+1
Answers: 1
Mathematics, 21.06.2019 20:00
Can someone factor this fully? my friend and i have two different answers and i would like to know if either of them is right. you in advance. a^2 - b^2 + 25 + 10a
Answers: 1
Mathematics, 21.06.2019 20:00
Sarah took the advertising department from her company on a round trip to meet with a potential client. including sarah a total of 11 people took the trip. she was able to purchase coach tickets for $280 and first class tickets for $1280. she used her total budget for airfare for the trip, which was $6080. how many first class tickets did she buy? how many coach tickets did she buy?
Answers: 1
Andrew was making a science project for school. He worked for 6.6 hours the first week, 2.75 hours t...
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