Theme Tasks catalog
Addition and subtraction of numbers 8 and 9. Difference comparison of segment lengths
• You will practice finding true equalities;
• You will learn how to add and subtract numbers 8 and 9 using a number line;
• You will learn to calculate expressions with addition and subtraction of numbers 8 and 9;
• You will practice solving problems to find the sum, the remainder, to increase a number by a few units, and to compare numbers by difference;
• You will find unknown parts and results of addition and subtraction actions;
• You will learn to compare named numbers shown in units of length – centimeters.
• You will learn how to add and subtract numbers 8 and 9 using a number line;
• You will learn to calculate expressions with addition and subtraction of numbers 8 and 9;
• You will practice solving problems to find the sum, the remainder, to increase a number by a few units, and to compare numbers by difference;
• You will find unknown parts and results of addition and subtraction actions;
• You will learn to compare named numbers shown in units of length – centimeters.
1
Calculate. Choose the needed numbers.
Calculate. Choose the needed numbers.
2
Let's see how to add 8 using a number line.
To add 8 to one,
you need to make 8 steps to the right from 1 on the number line.
We get 9.
Next, we think the same way:
add 8 to two, we get 10.
Remember the results of adding 8.
Let's see how to add 9 using a number line.
To add 9 to one,
you need to make 9 steps to the right from 1 on the number line.
We get 10.
Remember the result of adding 9.
Let's see how to add 8 using a number line.
To add 8 to one,
you need to make 8 steps to the right from 1 on the number line.
We get 9.
Next, we think the same way:
add 8 to two, we get 10.
Remember the results of adding 8.
Let's see how to add 9 using a number line.
To add 9 to one,
you need to make 9 steps to the right from 1 on the number line.
We get 10.
Remember the result of adding 9.
3
Use the number line to write the equation.
Drag the correct numbers and symbols into the boxes.
Use the number line to write the equation.
Drag the correct numbers and symbols into the boxes.
4
Look at the ten-frames and find the missing parts.
Drag the numbers to make the equations true.
Look at the ten-frames and find the missing parts.
Drag the numbers to make the equations true.
5
Look at the number bonds. Drag the missing numbers to complete each one.
Look at the number bonds. Drag the missing numbers to complete each one.
6
Fill in the blanks. Choose the right addends.
Fill in the blanks. Choose the right addends.
7
Let's see how to subtract 8 using a number line.
To subtract 8 from 9,
you need to make 8 steps to the left from 9 on the number line.
We get 1.
Next, we think the same way:
if we subtract 8 from ten, we get 2.
Remember the results of subtracting 8.
Let's see how to subtract 9 using a number line.
To subtract 9 from 10,
you need to make 9 steps to the left from 10 on the number line.
We get 1.
Remember the result of subtracting 9.
Let's see how to subtract 8 using a number line.
To subtract 8 from 9,
you need to make 8 steps to the left from 9 on the number line.
We get 1.
Next, we think the same way:
if we subtract 8 from ten, we get 2.
Remember the results of subtracting 8.
Let's see how to subtract 9 using a number line.
To subtract 9 from 10,
you need to make 9 steps to the left from 10 on the number line.
We get 1.
Remember the result of subtracting 9.
8
Use the number line to write the equation.
Drag the correct numbers and symbols into the boxes.
Use the number line to write the equation.
Drag the correct numbers and symbols into the boxes.
9
Look at the ten-frames. Find the missing number.
Drag the correct number to finish the equation.
Look at the ten-frames. Find the missing number.
Drag the correct number to finish the equation.
10
Look at the number bonds.
Drag the missing numbers to complete each one.
Look at the number bonds.
Drag the missing numbers to complete each one.
11
Make a short note and solve the problem.
Andriyko has been studying in music school for 3 years, and Oksanka -- for 2 years more.
How many years has Oksanka been studying in music school?
Make a short note and solve the problem.
Andriyko has been studying in music school for 3 years, and Oksanka -- for 2 years more.
How many years has Oksanka been studying in music school?
12
Listen to the story Problem.
Kevin has 9 blue crayons. Sarah has 7 red crayons.
How many fewer crayons does Sarah have than Kevin?
Complete the tape diagram. Drag and drop the numbers from the story.
Listen to the story Problem.
Kevin has 9 blue crayons. Sarah has 7 red crayons.
How many fewer crayons does Sarah have than Kevin?
Complete the tape diagram. Drag and drop the numbers from the story.
13
Calculate. Choose the needed numbers.
Calculate. Choose the needed numbers.
14
Listen to the story Problem.
There were 8 children on the school bus. 6 children got off the bus.
How many children are left on the bus?
Complete the tape diagram. Drag and drop the numbers from the story.
Listen to the story Problem.
There were 8 children on the school bus. 6 children got off the bus.
How many children are left on the bus?
Complete the tape diagram. Drag and drop the numbers from the story.
15
Listen to the story Problem.
A sports store has 9 green baseball caps and 5 red baseball caps.
How many more green baseball caps are there than red baseball caps?
Complete the tape diagram. Drag and drop the numbers from the story.
Listen to the story Problem.
A sports store has 9 green baseball caps and 5 red baseball caps.
How many more green baseball caps are there than red baseball caps?
Complete the tape diagram. Drag and drop the numbers from the story.
16
Insert the sign "greater", "less" or "equals".
Insert the sign "greater", "less" or "equals".
17
Choose the true equations.
Choose the true equations.
18
Compare the lengths of the segments.
How much shorter is the first segment than the second?
Compare the lengths of the segments.
How much shorter is the first segment than the second?
19
Compare the lengths of the segments.
How much longer is the second segment than the first?
Compare the lengths of the segments.
How much longer is the second segment than the first?
