Problem 1
A school library unpacked 30 new fiction books on Monday and 20 new non-fiction books on Tuesday. How many new books were added altogether?
Answer: 50 books
- Find the two amounts: 30 and 20.
- Add them: 30 + 20 = 50.
- Use the word altogether as a clue that the parts should be combined.
How to explain it: If your child hesitates, ask, “Are we joining two amounts or comparing them?” That usually points them to addition.
Problem 2
A bakery sold 36 muffins in the morning, 15 muffins at lunch, and 20 muffins after school. How many muffins did it sell that day?
Answer: 71 muffins
- Add the first two groups: 36 + 15 = 51.
- Add the last group: 51 + 20 = 71.
- When there are three amounts, it helps to combine two first, then add the third.
How to explain it: Children often stop after adding two numbers. Teach them to scan the question again and check whether one more amount is hiding at the end.
Problem 3
A fundraiser collected 140 dollars from families and 154 dollars from local shops. How much money did they collect in total?
Answer: 294 dollars
- Write the two totals: 140 and 154.
- Add ones, tens, and hundreds carefully: 140 + 154 = 294.
- The phrase in total tells us to combine the donations.
How to explain it: Use place value columns if your child loses track when larger numbers require regrouping.
Problem 4
Leah spent $1.70 on markers and $4.40 on paper. How much did she spend altogether?
Answer: $6.10
- Treat the prices like decimals or cents: 170 cents + 440 cents.
- Add the cents: 170 + 440 = 610 cents.
- Convert back to dollars: 610 cents = $6.10.
How to explain it: Money is a great model because children can see that dollars and cents are just two place-value parts of the same total.
Problem 5
A class walked 13 kilometres on Monday and 16 kilometres on Wednesday during sports week. How far did they walk altogether?
Answer: 29 kilometres
- Add the two distances because the question asks for the whole distance walked.
- 13 + 16 = 29.
- Keep the unit attached so the answer stays meaningful.
How to explain it: Many children drop the unit. Ask, “${i + j} what?” so they remember to include kilometres.
Problem 6
The school concert lasted 40 minutes for the choir, 48 minutes for the band, and 15 minutes for the finale. How many minutes of performance were there altogether?
Answer: 103 minutes
- Add the first two times: 40 + 48 = 88.
- Add the finale: 88 + 15 = 103.
- This question is still addition even though it is about time.
How to explain it: Children sometimes think time always means reading a clock. Remind them that minutes can also be combined like any other quantity.
Problem 7
One carton holds 11 juice boxes. Another carton holds 14 juice boxes. A teacher opens both cartons and adds 15 extra boxes from the cupboard. How many juice boxes are there now?
Answer: 40 juice boxes
- Add the cartons: 11 + 14 = 25.
- Add the extra boxes: 25 + 15 = 40.
- The extra boxes mean there is one more amount to include.
How to explain it: This is a nice check for whether your child reads the full sentence instead of stopping after the first easy step.
Problem 8
Three cousins saved 39, 47, and 54 stickers. How many stickers did they save altogether?
Answer: 140 stickers
- Add two cousins first: 39 + 47 = 86.
- Add the third amount: 86 + 54 = 140.
- Any order works in addition, but breaking the problem into two steps reduces mistakes.
How to explain it: If your child is overwhelmed, cover the third number and solve the first small part first.
Problem 9
A shop sold 28 red balloons, 39 blue balloons, and 45 yellow balloons before lunch. How many balloons were sold before lunch?
Answer: 112 balloons
- Add the first two colours: 28 + 39 = 67.
- Add the last colour: 67 + 45 = 112.
- Before lunch tells us when the sales happened, not which operation to use.
How to explain it: Children sometimes get distracted by story details. Ask which detail changes the math and which detail only sets the scene.
Problem 10
A puzzle game gives 20 points for level 1, 15 points for level 2, and 11 points for level 3. If Mia completed all three levels, how many points did she earn?
Answer: 46 points
- Add the first two scores: 20 + 15 = 35.
- Add the last score: 35 + 11 = 46.
- Because Mia earns points from every level, all three amounts must be combined.
How to explain it: This is a good place to reinforce that earning points across several stages means accumulation, which is another clue for addition.