Work through the levels in order. Type your answer and press Check — open the worked solution if you get stuck. Answers like -6, 3/4 or 0.25 are typed exactly as shown. A ⭐ Bonus Challenge at the end is extra credit — skip it if the rest was hard work.
Level 1 · Warm-up
1 A shop had 420 apples and sold 185. How many are left?
Show worked solution
420 − 185 = 235 apples.
2 Ben has 260 stickers. Mia has 145 more than Ben. How many does Mia have?
Show worked solution
260 + 145 = 405 stickers.
3 A bus had 48 people. 19 got off, then 27 got on. How many people are on the bus now?
Show worked solution
48 − 19 = 29, then 29 + 27 = 56 people.
Level 2 · Core
4 A library had 1500 books. It lent out 385 and had 120 returned. How many are on the shelves now?
Show worked solution
1500 − 385 = 1115, then 1115 + 120 = 1235 books.
5 Sam saved $85 in May and $67 in June, then spent $48. How much has he now?
Show worked solution
85 + 67 = 152, then 152 − 48 = $104.
6 Two classes have 58 students altogether. Class A has 6 more students than Class B. How many students are in Class A?
Show worked solution
Take out the extra 6: 58 − 6 = 52, so Class B has 52 ÷ 2 = 26 and Class A has 26 + 6 = 32. (26 + 32 = 58.)
Level 3 · Challenge
7 A farmer had some sheep. He sold 145 and then bought 78. He now has 433. How many did he start with?
Show worked solution
Undo the buying: 433 − 78 = 355. Undo the selling: 355 + 145 = 500 sheep.
8 Three numbers add to 900. The first is 250 and the second is 80 more than the first. What is the third?
Show worked solution
The second is 250 + 80 = 330. The first two make 250 + 330 = 580, so the third is 900 − 580 = 320.
9 A tank held 2000 mL. 350 mL was poured out three times. How many millilitres are left?
Show worked solution
Poured out: 3 × 350 = 1050 mL. Left: 2000 − 1050 = 950 mL.
⭐ Bonus Challenge · only if the rest felt easy
10 A shop had 250 drinks. It sold 68 on Monday and 75 on Tuesday, then a delivery of 40 arrived. How many drinks now?
Show worked solution
250 − 68 = 182. Then 182 − 75 = 107. Then 107 + 40 = 147 drinks.