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Difference and quotient comparison

Source: licencja: CC 0.

Porównywanie różnicowe i ilorazowe liczb naturalnych

Learning objectives

  • Comparing the natural numbers using the different and quotient.

Learning effect

  • You compare the natural numbers.

  • You answer the following questions: How much more? How much less? How many times more? How many times less?

  • You use English to compare the natural numbers.

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nagranie abstraktu

Prepare the measure tape and bring it for the lesson. It will be used during the summarising tasks.

Revise the comparison of the natural numberscomparison of the natural numberscomparison of the natural numbers.

Today you are going to compare the natural numbers by using the difference and the quotient.

Task 1

Analyse the interactive illustrations concerning the difference and quotient comparisonquotient comparisonquotient comparison.

Difference comparisondifference comparisonDifference comparison of natural numbers

The drawing presents the girl and her father.

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Ilustracja interaktywna przedstawia rysunek dziewczynki o wzroście 145 cm i mężczyzny o wzroście 190 cm. Na ilustracji widoczne są numery, a na nich podpisy. 1. The girl is shorter than her father by 45 cm, because 190 cm – 145 cm = 45 cm. {audio}, 2. Dad is taller than his daughter by 45 cm because 190 cm – 145 cm = 45 cm {audio}.
Girl and her father
Source: GroMar, licencja: CC BY 3.0.

Quotient comparison of numbers

The drawing presents the price of goods in the shop.

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Ilustracja interaktywna przedstawia telewizor w cenie 2450 PLN i rower w cenie 1225 PLN. Na ilustracji widoczne są numery, a na nich podpisy. 1. The TV set is twice as expensive as the bike, because 2450 PLN divided by 1225 PLN equals 2 {audio}, 2. The bike is twice as cheap as the TV set, because 2450 PLN divided by 1225 PLN equals 2 {audio}.
TV and the bike
Source: GroMar, licencja: CC BY 3.0.

Consider:

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nagranie abstraktu

What should be done to carry out the difference comparisondifference comparisondifference comparison of two numbers?

What should be done to carry out the quotient comparisonquotient comparisonquotient comparison of two numbers?

Note, that:

- When we carry out the difference comparison of two numbers we use the subtraction.

- When we carry out the quotient comparison of two numbers we use the quotient. 

Task 2
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nagranie abstraktu

Drawing A presents the parrots sitting on the fence and in drawing B we can see the parrots sitting on a tree.

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Source: GroMar, licencja: CC BY 3.0.

How many timeshow many times?How many times more parrots sit on the tree in comparison to the fence?

How muchhow much? How much less parrots sit on the fence in comparison to the tree?

Task 3

Darek is nine, his sister is 8 years older. Marcin is 12 years old, his sister is 6 years older. Which sister is older and how many years more?

Task 4
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nagranie abstraktu

Caroline has bought 17 sweets, Mary has bought four times more. How many sweets have they bought together? How much more sweets has Mary bought?

Task 5
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nagranie abstraktu

Adam has got two horses: the bay and the black ones and a hen. The hen weights 2 kilos. The total weight of the horses is 800 times more than the weight of the hen. The weight of the black and bay horses are the same.

a) How much does the black horse weight?
b) How many more times does the bay horse weight in comparison to the hen?
c) How much less does the hen weight in comparison to the black horse?

Task 6

An extra task:

Darek, Adam and Paweł have written one natural number on the sheet of paper. The number written by Paweł was 30 times largerlargerlarger than the number of Darek. And the number written by Darek is less by 30 in comparison to Adam’s number. What number has Adam written down if Paweł has written the number of 4500?

Remember:

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nagranie abstraktu
  • When we carry out the difference comparisondifference comparisondifference comparison of two numbers we use the subtraction.

  • When we carry out the quotient comparisonquotient comparisonquotient comparison of two numbers we use the quotient.

Do the summarising tasks.

Exercises

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Exercise 1
Wersja alternatywna ćwiczenia: Determine which sentences are true. Możliwe odpowiedzi: 1. The number less by 40 than 2630 equals 2590., 2. The number 11 times larger than 200 equals 2200., 3. The number 1430 is larger by 10 than the number 143., 4. The number 920 is three time as large as 320., 5. The number 2000 reduced by five times equals 400.
Exercise 2

Use the measure tape to measure the length and the width of your book cover and then, the length and the width of your desk. Calculate:

a) How many centimetres does the perimeterperimeterperimeter of the desk is longer than the perimeter of the book cover?

b) How many times the areaareaarea of the book cover is less than the area of the desk?

You can use the calculator.

Exercise 3

Compare the numbers filling the gaps with the following signs: >, < or =.

a) 3450 [tu uzupełnij] 345
b) 50 [tu uzupełnij] 3500
c) 1325 [tu uzupełnij] 3975
a) 3450 [tu uzupełnij] 345
b) 50 [tu uzupełnij] 3500
c) 1325 [tu uzupełnij] 3975

Describe in English how muchhow much? how much the numbers differ in each case.

Exercise 4
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Wersja alternatywna ćwiczenia: Indicate which pairs of expressions or words are translated correctly. Możliwe odpowiedzi: 1. porównywanie liczb naturalnych - comparison of the natural numbers, 2. porównywanie różnicowe - difference comparison, 3. porównywanie ilorazowe - quotient comparison, 4. większa - larger, 5. o ile? - how many times?, 6. obwód - area
zadanie
Source: GroMar, licencja: CC BY 3.0.
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Interaktywna gra, polegająca na łączeniu wyrazów w pary w ciągu jednej minuty. Czas zaczyna upływać wraz z rozpoczęciem gry. Jeden ruch to odkrywanie najpierw jednej potem drugiej karty z wyrazem. Każdy wyraz jest odczytywany. Kolejny ruch to odkrywanie trzeciej i czwartej karty. W ten sposób odsłuchasz wszystkie wyrazy. Nawigacja z poziomu klawiatury za pomocą strzałek, odsłuchiwanie wyrazów enterem lub spacją. Znajdź wszystkie pary wyrazów.
Source: Zespół autorski Politechniki Łódzkiej, licencja: CC BY 3.0.

Glossary

comparison of the natural numbers
comparison of the natural numbers

porównywanie liczb naturalnych

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wymowa w języku angielskim: comparison of the natural numbers
difference comparison
difference comparison

porównywanie różnicowe

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wymowa w języku angielskim: difference comparison
quotient comparison
quotient comparison

porównywanie ilorazowe

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wymowa w języku angielskim: quotient comparison
larger
larger

większa

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wymowa w języku angielskim: larger
smaller
smaller

mniejsza

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wymowa w języku angielskim: smaller
how much?
how much?

o ile?

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wymowa w języku angielskim: how much
how many times?
how many times?

ile razy?

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wymowa w języku angielskim: how many times?
perimeter
perimeter

obwód

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wymowa w języku angielskim: perimeter
area
area

pole

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wymowa w języku angielskim: area

Keywords

comparison of the natural numberscomparison of the natural numberscomparison of the natural numbers

difference comparisondifference comparisondifference comparison

quotient comparisonquotient comparisonquotient comparison

largerlargerlarger

smallersmallersmaller