Log In

Question about Value Equivalence: Discount and Exchange

Mathematics

Originais Teachy

Value Equivalence: Discount and Exchange

Hard

(Originais Teachy 2022) - Question Hard of Mathematics

Marcos goes to his school's cafeteria and decides to buy a snack. He chooses a snack that costs 6 reais and a juice that costs 4 reais. When paying, he gave a 20 reais note. Which alternative represents a possible form of change?
a.
3 notes of 5 reais
b.
3 notes of 2 reais
c.
1 note of 2 reais and 1 note of 5 reais
d.
1 note of 10 reais

Answer sheet:

Lorem ipsum dolor sit amet, consectetur adipiscing elit. Curabitur id consequat justo. Cras pellentesque urna ante, eget gravida quam pretium ut. Praesent aliquam nibh faucibus ligula placerat, eget pulvinar velit gravida. Nam sollicitudin pretium elit a feugiat. Vestibulum pharetra, sem quis tempor volutpat, magna diam tincidunt enim, in ullamcorper tellus nibh vitae turpis. In egestas convallis ultrices.
Emoji eyes

Answer sheet

You need to be a registered teacher to view the answer sheet

Emoji eyes
Iara Tip

IARA TIP

Are you putting together a test or exercise list?

On Teachy’s platform, you can automatically generate these materials without spending hours searching for questions 😉

Those who viewed this question also liked...
Question icon

Question

Difficulty Hard

Source:

Is external icon

ENEM

Sequence Terms

Question icon

Question

Difficulty Hard

Source:

Is external icon

Teachy

During the cleaning of the cooling system of a factory, a technician must adjust a light reflector fixed on the ceiling of the room. The reflector has the shape of a right circular cone with the vertex pointing upwards and an opening angle of 75º. The technician wants to calculate the height and the radius of the base of the cone to determine the ideal dimensions of the mirrors that will be installed on the inner surface of the cone, so that the reflected light follows a beam parallel to the floor. Consider that the angle of incidence of light on the inner surface of the cone should be 15º with the normal to the surface at the point of incidence to ensure total reflection of light. Based on this configuration, determine the height and the radius of the base of the cone, and additionally, identify the value of the sine and cosine of 22.5º, an angle that arises in the resolution of the problem.

Trigonometric Lines of 75º, 15º, 22.5º

Question icon

Question

Difficulty Medium

Source:

Is external icon

Teachy

Pedro and Ana are tasked with packing sweets into bags for a school party. Pedro has 60 sweets, while Ana has 45 sweets. They want each bag to have the same number of sweets from both Pedro and Ana, with no sweets left over. What is the maximum number of bags they can fill?

GCD Problems

Question icon

Question

Difficulty Hard

Source:

Is external icon

Teachy

In Ana's lunchbox, she has 8 green grapes and 6 purple grapes. In João's lunchbox, he has 4 grapes of each color. If they combine all the grapes and divide them equally between them, who will have more grapes, Ana or João? Write two different addition equations that result in the same total number of grapes to help Ana and João divide the grapes fairly.

Equality: Identical Sums and Subtractions

Community img

Join a community of teachers directly on WhatsApp

Connect with other teachers, receive and share materials, tips, training, and much more!

Teachy logo

We reinvent teachers' lives with artificial intelligence

Instagram LogoLinkedIn LogoTwitter LogoYoutube Logo
BR flagUS flagES flagIN flagID flagPH flagVN flagID flagID flag
FR flagMY flagur flagja flagko flagde flagbn flagID flagID flagID flag

2023 - All rights reserved

Terms of UsePrivacy NoticeCookies Notice