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Comparing: numbers, common fractions and decimal fractions

Source: licencja: CC 0.

Porównywanie: liczb, ułamków zwykłych i dziesiętnych

Learning objectives

  • You will learn to compare numbers, common fractions and decimal fractions.

Learning effect

  • You compare numbers, common fractions and decimal fractions.

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nagranie abstraktu

Revise rules of comparing numbers.

Think and answer the questions in your notebook:

1. How do we compare natural numbersnatural numbersnatural numbers?
2. How do we compare decimal fractionsdecimal fractionsdecimal fractions?
3. How do we compare common fractionscommon fractionscommon fractions?

Compare your answers with rules of comparing numbers below.

Rules of comparing numbers:

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nagranie abstraktu

1. Out of two numbers marked on the number linenumber linenumber line, the one that is located farther from the zero is greater.
2. Out of two natural numbersnatural numbersnatural numbers, the one that has more digits is greater. If numbers have the same number of digits, we compare digits in each rows of both numbers, starting from the highest.
3. To compare two decimal fractionsdecimal fractionsdecimal fractions, we compare the whole parts first and then fraction parts.
4. If two common fractionscommon fractionscommon fractions have the same denominators, then the one that has a greater numerator is greater. If two fractions have the same numerators, then the one that has a smaller denominator is greater. If two fractions have different numerators and denominators, then we need to find the common numerator or denominator and then compare them.

Using obtained knowledge, do the exercises.

Task 1
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nagranie abstraktu

Place numbers from the cloud in proper columns.

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Source: GroMar, licencja: CC BY 3.0.

Numbers smaller
than 15487

Numbers greater than 15487
and smaller than 35247

Numbers greater
than 35247

Task 2
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nagranie abstraktu

Give coordinates of points A, B, C, D and E presented on the number linenumber linenumber line.

Choose proper numbers from the table.

1,4

1

0,55

0,6

0,5

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Source: GroMar, licencja: CC BY 3.0.
Task 3
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Insert sign < or >.
2512 [tu uzupełnij] 259
3825 [tu uzupełnij] 534
5679 [tu uzupełnij] 5579
423 [tu uzupełnij] 437
415 [tu uzupełnij] 321
Task 4
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nagranie abstraktu

Open the applet. Do three exercises based on arranging numbers in the increasing order.

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Geogebra aplet - Porządkowanie liczb. Galeria z opisami alternatywnymi poniżej.
Source: GroMar, licencja: CC BY 3.0.
Task 5

An extra task:

Give five numbers that are located on the number linenumber linenumber line between numbers: 427 and 437.

Remember:

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nagranie abstraktu

1. Out of two numbers marked on the number linenumber linenumber line, the one that is located farther from the zero is greater.
2. Out of two natural numbersnatural numbersnatural numbers, the one that has more digits is greater. If numbers have the same number of digits, we compare digits in each rows of both numbers, starting from the highest.
3. To compare two decimal fractionsdecimal fractionsdecimal fractions, we compare the whole parts first and then fraction parts.
4. If two common fractionscommon fractionscommon fractions have the same denominators, then the one that has a greater numerator is greater. If two fractions have the same numerators, then the one that has a smaller denominator is greater. If two fractions have different numerators and denominators, then we need to find the common numerator or denominator and then compare them.

Exercises

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Exercise 1
Wersja alternatywna ćwiczenia: Choose the smallest number. Możliwe odpowiedzi: 1. 2 453 685, 2. 2 452 685, 3. 2 452 675, 4. 2 453 000
zadanie
Source: GroMar, licencja: CC BY 3.0.
Exercise 2

Compare numbers a and b if:

a=134+2,75
b=2,2+125
Exercise 3

Kasia and Asia want to the stationery shop. Kasia bought a pencil that costed 2,55 PLN, a pencil sharpener for 5,25 PLN and a calipers for 10,30 PLN. Asia bought a notebook that costed 7,30 PLN, a pen for 8,20 PLN and a ruler for 2,30 PLN?

Which girl paid more for the shopping? Write calculations and the answer in English.

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Exercise 4
Wersja alternatywna ćwiczenia: Indicate which pairs of expressions or words are translated correctly. Możliwe odpowiedzi: 1. większa liczba naturalna - greater natural number, 2. liczby naturalne - natural numbers, 3. oś liczbowa - number line, 4. porównywanie dwóch liczb, które mają tyle samo cyfr - comparing two natural number numbers that have the same number of digits, 5. porównywanie dwóch ułamków dziesiętnych - comparing two common fractions, 6. porównywanie dwóch ułamków zwykłych - comparing two decimal fractions
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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

common fractions
common fractions

ułamki zwykłe

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wymowa w języku angielskim: common fractions
comparing two common fractions
comparing two common fractions

porównywanie dwóch ułamków zwykłych

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wymowa w języku angielskim: comparing two common fractions
comparing two decimal fractions
comparing two decimal fractions

porównywanie dwóch ułamków dziesiętnych

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wymowa w języku angielskim: comparing two decimal fractions
comparing two natural number numbers that have the same number of digits
comparing two natural number numbers that have the same number of digits

porównywanie dwóch liczb, które mają tyle samo cyfr

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wymowa w języku angielskim: comparing two natural number numbers that have the same number of digits
decimal fractions
decimal fractions

ułamki dziesiętne

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wymowa w języku angielskim: decimal fraction
greater natural number
greater natural number

większa liczba naturalna

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wymowa w języku angielskim: greater natural number
natural numbers
natural numbers

liczby naturalne

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wymowa w języku angielskim: natural numbers
number line
number line

oś liczbowa

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wymowa w języku angielskim: number line

Keywords

comparing two common fractionscomparing two common fractionscomparing two common fractions

comparing two decimal fractionscomparing two decimal fractionscomparing two decimal fractions

comparing two natural number numbers that have the same number of digitscomparing two natural number numbers that have the same number of digitscomparing two natural number numbers that have the same number of digits

greater natural numbergreater natural numbergreater natural number

number linenumber linenumber line