Theme Tasks catalog
Subtraction of numbers. The sign "–"
• You will practice choosing the next and neighboring numbers for a given number;
• You will practice comparing groups of objects and the corresponding numbers;
• You will learn about the arithmetic operation of subtraction and the sign "−";
• You will find out how to read a subtraction equation correctly;
• You will learn to make subtraction equations using schematic pictures;
• You will practice calculating subtraction expressions.
• You will practice comparing groups of objects and the corresponding numbers;
• You will learn about the arithmetic operation of subtraction and the sign "−";
• You will find out how to read a subtraction equation correctly;
• You will learn to make subtraction equations using schematic pictures;
• You will practice calculating subtraction expressions.
1
Which items are in pairs of two?
Choose them.
Which items are in pairs of two?
Choose them.
2
Choose the next number for each number.
Choose the next number for each number.
3
Match the correct numbers to the objects.
Match the correct numbers to the objects.
4
Choose the neighboring numbers.
Choose the neighboring numbers.
5
Find three triangles of the same color. Choose them.
Find three triangles of the same color. Choose them.
6
Insert the sign greater, less or equals.
Insert the sign greater, less or equals.
7
Look at the sheep that are in one pen.
There are three sheep here.
Let's move one sheep to the second pen.
There are two sheep left in the first pen.
In math, taking away part of the objects is called subtraction.
Subtraction equations are written using the minus sign.
The equation is read like this:
three minus one equals two
or three take away one is two.
Let's do the task together.
Let's write the equation using numbers and a schematic picture.
Look at the screen. Here are three cows.
Then two cows went home.
There is one cow left in the field.
So three minus two equals one.
Let's drag the needed numbers to the correct fields.
Do the next tasks by yourself.
Look at the sheep that are in one pen.
There are three sheep here.
Let's move one sheep to the second pen.
There are two sheep left in the first pen.
In math, taking away part of the objects is called subtraction.
Subtraction equations are written using the minus sign.
The equation is read like this:
three minus one equals two
or three take away one is two.
Let's do the task together.
Let's write the equation using numbers and a schematic picture.
Look at the screen. Here are three cows.
Then two cows went home.
There is one cow left in the field.
So three minus two equals one.
Let's drag the needed numbers to the correct fields.
Do the next tasks by yourself.
8
Find all the minus signs, choose them.
Find all the minus signs, choose them.
9
In a subtraction equation, first write the number of elements in the set.
After the minus sign, write the number of elements that are taken away.
And after the equals sign, write the number of elements left in the set after taking away.
In a subtraction equation, first write the number of elements in the set.
After the minus sign, write the number of elements that are taken away.
And after the equals sign, write the number of elements left in the set after taking away.
10
Complete the scheme.
Place the needed number of mushrooms.
Complete the scheme.
Place the needed number of mushrooms.
11
Make an equation using numbers and a schematic picture.
Make an equation using numbers and a schematic picture.
12
Make a subtraction equation.
Choose the correct numbers.
Make a subtraction equation.
Choose the correct numbers.
13
Insert the sign "greater", "less" or "equals".
Insert the sign "greater", "less" or "equals".
14
Make a subtraction equation.
Choose the correct numbers.
Make a subtraction equation.
Choose the correct numbers.
15
Calculate using the number line.
Choose the correct number.
Calculate using the number line.
Choose the correct number.
16
Calculate. Choose the correct numbers.
Calculate. Choose the correct numbers.
