Write or draw to explain a way to find each sum: 6+7, 8+4, 2+9

Mathematics

2 answers:

riadik2000 [5.3K]3 years ago

7 0

Step-by-step explanation:

For 6+7, on a number line we have placed a point A on value 6. On moving 7 units in the rightwards direction a point B is marked. That means when we move from 0 to point B, we get the result for 6+7 = 13.

For 8+4, on a number line we have placed a point C on value 8. On moving 4 units in the rightwards direction a point D is marked. That means when we move from 0 to point D, we get the result for 8+4 = 12.

For 2+9, on a number line we have placed a point E on value 2. On moving 9 units in the rightwards direction a point F is marked. That means when we move from 0 to point F, we get the result for 2+9 = 11.

storchak [24]3 years ago

6 0

Draw six dots then a plus sign then draw seven dots and the count them and put an equal sign and however many dots. Doe the same with the other numbers

You might be interested in

−(−10−6)= <br> And explain how you did it<br> 20 points

kolezko [41]

-(-10-6)=x
if there is nothing behind the negative sign put a 1 there.
-1(-10-6)=x
-1*(-10)= 10
-1*6= -6
10-(-6)= 16

3 0

3 years ago

Determine the values of n

N76 [4]

<h2>Answer:</h2><h3>b. n is odd</h3><h2>Step-by-step explanation:</h2>

In this problem, we assume that $n$ is a whole number. The definition of inverse functions tells us that a function $f$ has an inverse function if and only if the function is one-to-one, that is, if there is no any horizontal line intersecting the graph of $f$ at more than one point. This only happens if $n$ is odd. This is called the Horizontal Line Test for Inverse Functions. So let's take two examples: