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2 years ago

What do you need to do to add and subtract decimals?

Mathematics

2 answers:

olga nikolaevna [1]2 years ago

6 0

Answer:

Write down the numbers, one under the other, with the decimal points lined up

Put in zeros so the numbers have the same length

Then add using column addition, remembering to put the decimal point in the answer

Step-by-step explanation:

Elza [17]2 years ago

6 0

Line up decimals and add/subtract no different then when you’re adding and subtracting normal numbers

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Find the values of x and y. lines that appear to be tangent are tangent

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Complete Question

The complete question is shown on the first uploaded image

Answer:

The value of $y = 122^o$

The value of $x = 61^o$

Step-by-step explanation:

Generally the total angle that make up a circle is

$\theta _T = 360$

From the diagram we see that

$\theta _T = y^o + 238^o$

=> $y^o = 360 -238$

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2 years ago

Ameera had $10.50 with her. She bought some pencils costing $2.50 each and some erasers costing $1.00 each. Could she buy 4 penc

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2 years ago

The difference of a number and -6 is less than 9 write an inequality and solve

Pavlova-9 [17]

Answer:

n - (-6) < 9

n < 3

Step-by-step explanation:

When setting up an inequality, using the key words from the problem will help. The word 'difference' would indicate subtraction and 'less than' would be the '<' inequality sign. Since the expression is 'the difference of a number and -6', we write:

n - (-6) < 9

Whenever we subtract a negative number, we change both signs to positive:

n + 6 < 9

Using inverse operations to solve: n + 6 - 6 < 9 - 6

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