3 years ago

Add or subtract mentally 16.9+ 12.1

Mathematics

2 answers:

saul85 [17]3 years ago

7 0

When you add it mentally you'd get 29
When you subtract it mentally you'd get 4.8

Ostrovityanka [42]3 years ago

6 0

Well, just add or subtract it form the back and work your way to the front, and you have to remember what the digit was.

16.9 + 12.1 = 29
16.9 - 12.1 = 4.8

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280 students went on a field trip. 5 buses were filled and 10 students traveled in cars. How many students were in each bus?

mylen [45]

Answer:280-10/5 (everything over/divided by 5)

Step-by-step explanation:

280 is all the students 10 go in car so subtract that and divide the answer by 5.

6 0

3 years ago

Which expression doesn't belong? Why does it not belong? A. 7.9x B. 7.9 · (-10) C. 7.9 + x D. - 79

motikmotik

Answer:

C. 7.9 + x

Step-by-step explanation:

Given - A. 7.9x B. 7.9 · (-10) C. 7.9 + x D. - 79

To find - Which expression doesn't belong? Why does it not belong?

Proof -

As given

A. 7.9x

B. 7.9·(-10)

C. 7.9 + x

D. -79

As we can see that Option A, B, D are the multiple of 7.9 but Option C is not the multiple of 7.9

So, Option C does not belong here.

∴ we get

The correct answer is - C. 7.9 + x

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vredina [299]

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4 years ago

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4 years ago

Real life problem for (-10+-2)=12

Marat540 [252]

Hello!

$\bf [ (-10) + (-2) ] = 12$

$\bf [ (-10) - 2 ] = 12$

$\bf -10 - 2 = 12$

$\bf -12 ≠ 12$

Answer: Wrong

Good luck! :)

4 0

3 years ago