Theme Tasks catalog
Inverse problem
• You will learn what an inverse problem is;
• You will learn to compare direct and inverse problems;
• You will improve your skills in adding and subtracting with and without regrouping within 20;
• You will practice finding the longest segment by measurement results;
• You will do mental addition and subtraction "in a chain".
• You will learn to compare direct and inverse problems;
• You will improve your skills in adding and subtracting with and without regrouping within 20;
• You will practice finding the longest segment by measurement results;
• You will do mental addition and subtraction "in a chain".
1
Insert the sign "greater", "less" or "equals".
Insert the sign "greater", "less" or "equals".
2
Subtract 10. Choose the correct numbers.
Subtract 10. Choose the correct numbers.
3
Calculate. Choose the correct numbers.
Calculate. Choose the correct numbers.
4
Calculate the expressions by splitting numbers into easy addends.
Calculate the expressions by splitting numbers into easy addends.
5
Make a short record for the problems.
Compare and solve the problems.
Vitalik caught 6 crucian carps, and Maksym caught 5.
How many crucian carps did the boys catch in total?
Make a short record for the problems.
Compare and solve the problems.
Vitalik caught 6 crucian carps, and Maksym caught 5.
How many crucian carps did the boys catch in total?
6
Vitalik and Maksym caught 11 crucian carps.
Vitalik – 6 crucian carps and Maksym – some.
How many crucian carps did Maksym catch?
Vitalik and Maksym caught 11 crucian carps.
Vitalik – 6 crucian carps and Maksym – some.
How many crucian carps did Maksym catch?
7
Vitalik and Maksym caught 11 crucian carps.
Vitalik – some and Maksym – 5.
How many crucian carps did Vitalik catch?
Vitalik and Maksym caught 11 crucian carps.
Vitalik – some and Maksym – 5.
How many crucian carps did Vitalik catch?
8
Calculate the expressions by splitting numbers into easy addends.
Calculate the expressions by splitting numbers into easy addends.
9
Find the smallest number and choose it.
Find the smallest number and choose it.
10
Choose the previous number for each number.
Choose the previous number for each number.
11
Find the longest segment and choose it.
Find the longest segment and choose it.
12
Help the bird fly to the chicks.
Help the bird fly to the chicks.
