Year 1 Maths: Add with Cubes – Sums Up to 20

Introduction to Adding with Cubes

Hello, everyone! Today, we’re going to learn how to add numbers using cubes. Cubes are fun blocks that help us see and count. When we add, we combine two groups of cubes to find out how many we have altogether.

What is Addition?

Addition means putting things together. For example, if you have 3 red cubes and 2 blue cubes, you can put them together to find out how many cubes you have in total. We write this as:

$$3 + 2 = 5$$

This means 3 plus 2 equals 5.

Using Cubes to Add

Step 1: Gather Your Cubes

To start, you need some cubes. You can use real cubes or draw some on paper. Let’s say you have 4 cubes.

Step 2: Add Another Group

Now, let’s say you have 3 more cubes.

Step 3: Count Them All Together

Place your 4 cubes next to the 3 cubes. Now, count all the cubes together:

• 1, 2, 3, 4 (the first group)
• 5, 6, 7 (the second group)

So, we can say:

$$4 + 3 = 7$$

Key Rules for Adding

1. Count carefully: Always count each cube one by one.
2. Combine groups: Put your groups together to see the total.
3. Check your work: After you find the answer, double-check by counting again.

Tips and Tricks

• Use Different Colours: If you have cubes in different colours, it can help to see the groups better.
• Draw It Out: If you can’t use cubes, draw them on paper. This helps you visualise the numbers.
• Practice with Friends: Work with a buddy to make it more fun!

Questions

Easy Level Questions

1. What is $$1 + 1$$?
2. What is $$2 + 2$$?
3. What is $$3 + 1$$?
4. What is $$4 + 0$$?
5. What is $$5 + 2$$?
6. What is $$6 + 3$$?
7. What is $$2 + 5$$?
8. What is $$4 + 1$$?
9. What is $$3 + 3$$?
10. What is $$0 + 7$$?
11. What is $$1 + 4$$?
12. What is $$5 + 0$$?
13. What is $$2 + 3$$?
14. What is $$1 + 6$$?
15. What is $$3 + 0$$?
16. What is $$2 + 1$$?
17. What is $$6 + 1$$?
18. What is $$4 + 4$$?
19. What is $$0 + 5$$?
20. What is $$7 + 2$$?

Medium Level Questions

1. What is $$2 + 8$$?
2. What is $$9 + 2$$?
3. What is $$5 + 5$$?
4. What is $$3 + 4$$?
5. What is $$7 + 3$$?
6. What is $$6 + 4$$?
7. What is $$5 + 2$$?
8. What is $$8 + 1$$?
9. What is $$10 + 5$$?
10. What is $$1 + 9$$?
11. What is $$2 + 7$$?
12. What is $$4 + 3$$?
13. What is $$8 + 0$$?
14. What is $$6 + 2$$?
15. What is $$3 + 5$$?
16. What is $$7 + 1$$?
17. What is $$2 + 6$$?
18. What is $$5 + 4$$?
19. What is $$0 + 10$$?
20. What is $$9 + 1$$?

Hard Level Questions

1. What is $$10 + 10$$?
2. What is $$8 + 7$$?
3. What is $$6 + 5$$?
4. What is $$12 + 3$$?
5. What is $$7 + 4$$?
6. What is $$11 + 9$$?
7. What is $$15 + 5$$?
8. What is $$9 + 8$$?
9. What is $$10 + 5$$?
10. What is $$13 + 6$$?
11. What is $$14 + 4$$?
12. What is $$6 + 7$$?
13. What is $$10 + 6$$?
14. What is $$9 + 5$$?
15. What is $$3 + 12$$?
16. What is $$16 + 3$$?
17. What is $$11 + 9$$?
18. What is $$8 + 6$$?
19. What is $$10 + 9$$?
20. What is $$17 + 2$$?

Answers

Easy Level Answers

1. $$1 + 1 = 2$$. You have two cubes in total.
2. $$2 + 2 = 4$$. Count the cubes: 1, 2, 3, 4.
3. $$3 + 1 = 4$$. One more cube makes four cubes altogether.
4. $$4 + 0 = 4$$. You still have four cubes because you added none.
5. $$5 + 2 = 7$$. Adding two more cubes gives you seven.
6. $$6 + 3 = 9$$. Count them all together for nine cubes.
7. $$2 + 5 = 7$$. Two cubes and five more make seven.
8. $$4 + 1 = 5$$. Add one more cube to get five cubes.
9. $$3 + 3 = 6$$. Three cubes plus three more equal six cubes.
10. $$0 + 7 = 7$$. You have seven cubes, since you started with zero.
11. $$1 + 4 = 5$$. Adding four cubes makes five.
12. $$5 + 0 = 5$$. You still have five cubes because you added none.
13. $$2 + 3 = 5$$. Two cubes and three more equal five cubes.
14. $$1 + 6 = 7$$. One cube plus six gives you seven.
15. $$3 + 0 = 3$$. You still have three cubes because you added none.
16. $$2 + 1 = 3$$. Adding one more cube gives you three cubes.
17. $$6 + 1 = 7$$. One more cube makes seven cubes.
18. $$4 + 4 = 8$$. Four cubes and four more equal eight cubes.
19. $$0 + 5 = 5$$. You still have five cubes, starting from zero.
20. $$7 + 2 = 9$$. Adding two more gives you nine cubes.

Medium Level Answers

1. $$2 + 8 = 10$$. Two cubes and eight more make ten cubes.
2. $$9 + 2 = 11$$. Nine cubes plus two more equals eleven cubes.
3. $$5 + 5 = 10$$. Five cubes and five more equal ten cubes.
4. $$3 + 4 = 7$$. Three cubes plus four make seven cubes.
5. $$7 + 3 = 10$$. Seven cubes and three more equal ten cubes.
6. $$6 + 4 = 10$$. Six cubes plus four make ten cubes.
7. $$5 + 2 = 7$$. Five cubes and two more equal seven cubes.
8. $$8 + 1 = 9$$. One more cube makes nine cubes.
9. $$10 + 5 = 15$$. Ten cubes and five more equal fifteen cubes.
10. $$1 + 9 = 10$$. One cube plus nine makes ten cubes.
11. $$2 + 7 = 9$$. Two cubes and seven more equal nine cubes.
12. $$4 + 3 = 7$$. Four cubes plus three make seven cubes.
13. $$8 + 0 = 8$$. You still have eight cubes, starting from eight.
14. $$6 + 2 = 8$$. Six cubes and two more equal eight cubes.
15. $$3 + 5 = 8$$. Three cubes plus five make eight cubes.
16. $$7 + 1 = 8$$. One more cube makes eight cubes.
17. $$2 + 6 = 8$$. Two cubes and six more equal eight cubes.
18. $$5 + 4 = 9$$. Five cubes and four more equal nine cubes.
19. $$0 + 10 = 10$$. You have ten cubes, starting from zero.
20. $$9 + 1 = 10$$. Nine cubes and one more equal ten cubes.

Hard Level Answers

1. $$10 + 10 = 20$$. Ten cubes plus ten more equals twenty cubes.
2. $$8 + 7 = 15$$. Eight cubes and seven more make fifteen cubes.
3. $$6 + 5 = 11$$. Six cubes plus five makes eleven cubes.
4. $$12 + 3 = 15$$. Twelve cubes and three more equal fifteen cubes.
5. $$7 + 4 = 11$$. Seven cubes and four more equal eleven cubes.
6. $$11 + 9 = 20$$. Eleven cubes plus nine more equals twenty cubes.
7. $$15 + 5 = 20$$. Fifteen cubes and five more make twenty cubes.
8. $$9 + 8 = 17$$. Nine cubes plus eight makes seventeen cubes.
9. $$10 + 5 = 15$$. Ten cubes and five more equal fifteen cubes.
10. $$13 + 6 = 19$$. Thirteen cubes plus six more make nineteen cubes.
11. $$14 + 4 = 18$$. Fourteen cubes and four more equal eighteen cubes.
12. $$6 + 7 = 13$$. Six cubes plus seven makes thirteen cubes.
13. $$10 + 6 = 16$$. Ten cubes and six more equal sixteen cubes.
14. $$9 + 5 = 14$$. Nine cubes and five more make fourteen cubes.
15. $$3 + 12 = 15$$. Three cubes plus twelve makes fifteen cubes.
16. $$16 + 3 = 19$$. Sixteen cubes plus three makes nineteen cubes.
17. $$11 + 9 = 20$$. Eleven cubes and nine more equal twenty cubes.
18. $$8 + 6 = 14$$. Eight cubes and six more make fourteen cubes.
19. $$10 + 9 = 19$$. Ten cubes plus nine more equal nineteen cubes.
20. $$17 + 2 = 19$$. Seventeen cubes and two more make nineteen cubes.

I hope you enjoyed learning about adding with cubes! Remember to practice, and soon, you’ll be a great mathematician!