Open the interactive illustration and think about what operation needs to be done first to be able to add common and decimal fractiondecimal fractiondecimal fraction.

After having completed the exercise, they draw a conclusion and compare it with the following one.

Region I – addition.

Tasks for 1 point.

1. Do the addition: $\frac{1}{2}+0,75$

2. Do the addition: $1,25+\frac{1}{6}$

3. Do the addition: $4\frac{2}{9}+3,7$

4. Do the addition: $5\frac{3}{10}+6,5$

Task for 2 points.

5. Mum made a drink out of 4,75 kg of plums, $3\frac{1}{8}$ kg of apples $2\frac{1}{2}$ kg of strawberries. How many kilograms of fruits did she use?

Region II – subtraction.

Tasks for 1 point.

1. Do the subtraction: $\frac{5}{6}-0,125$

2. Do the subtraction: $2\frac{2}{7}-0,6$

3. Do the subtraction: $12,05-3\frac{1}{8}$

4. Do the subtraction: $18\frac{1}{5}-0,25$

Task for 2 points.

5. Ania bought green ribbon and $4\frac{3}{4}$ m of blue ribbon. How many metres of green ribbon did she buy if together there was 8,5 m of ribbon?

Region III – multiplication.

Tasks for 1 point.

1. Do the multiplication: $\frac{4}{7}\cdot 0,28$

2. Do the multiplication: $5\frac{3}{5}\cdot 1,5$

3. Do the multiplication: $0,21\cdot 2\frac{2}{7}$

4. Do the multiplication: $92,03\cdot \frac{1}{10000}$

Task for 2 points.

5. A kilogram of pears costs 3,3 zł. How much will we pay for $\frac{1}{3}$ kg of pears?

Region IV – division.

Tasks for 1 point.

1. Do the division: $\frac{6}{25}:0,6$

2. Do the division: $0,48:1\frac{1}{7}$

3. Do the division: $5,5:2\frac{3}{4}$

4. Do the division: $2\frac{1}{4}:0,75$

Task for 2 points.

5. The area of a rectangle is 6,25 cmIndeks górny 2², and the length of one side is $2\frac{1}{2}$ cm. Calculate the length of the other side of the rectangle.

An extra task:

The quotientquotientquotient of two numbers is equal to $4\frac{1}{6}$, and the divisor is $2\frac{29}{30}$ smaller than the quotient. Calculate the dividend.

Calculate by how much the sum of numbers $5\frac{3}{8}$ and 0,25 is greater than the product of these numbers.

Kasia bought a kilogram of apples and a kilogram of peaches and she paid 12,5 zł. Calculate the price of 1 kg of these fruits if we know that the price of 1 kilogram of apples is $\frac{1}{4}$ of the price of 1 kilogram of peaches. Give the solution and the answer in English.