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ack12
24.11.2019 •
Mathematics
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Ответ:
28. a)![-7.3 + 7.4](/tpl/images/0389/1253/93b66.png)
29. c)![3n + 0.18](/tpl/images/0389/1253/294da.png)
Step-by-step explanation:
Question 28:
Given:
The equation is -9.6 + 9.5 + _________ = 0
In order to solve this, first let us simplify the terms -9.6 + 9.5.
-9.6 + 9.5 = -0.1
So, we are getting the sum of first 2 numbers as -0.1. Now, the result is 0. So, we know that, -a + a = 0. Therefore, the number that should come in the blanks should be -(-0.1) = 0.1
Now, among all the 4 choices, only choice (a) gives the sum as 0.1 as shown below:
-7.3 + 7.4 = 0.1
The options (b) and (c) has a result of 0 and option (d) sum is -0.1.
Therefore, the correct option is option (a).
Question 29:
Given:
The expression to simplify is given as:
Using commutative property of addition, we add the like terms together. Here, the like terms are
. So, we add them as shown below:
Therefore, the given expression is simplified to
. Hence, the correct option is option (c).
Ответ:
1.3
Step-by-step explanation:
You have 1 whole on the side, and then you have 3 strips on the left side and each strip is 10=1
so if you have 3 strips it's like having 30 piecesit's, but in other words, its 3tenths/0.3
so your answer is 1.3