
21 problems graded by difficulty (★ easy, ★★ medium, ★★★ hard). Try first, without looking at the solutions!
1 Ducks on a pond ★★★
7 ducks are on a pond. 6 more ducks swim over. How many ducks are on the pond now? Write an equation.
2 Popped balloons ★★★
Maya has 15 balloons. 8 of them pop. How many balloons does she have left?
3 Red and blue marbles ★★★
A bag holds 9 red marbles and 4 blue marbles. How many marbles are in the bag?
4 Stickers on a page ★★★
Ben has 12 stickers. 5 are on a page and the rest are in a box. How many stickers are in the box?
5 True or false? ★★★
Say whether each sentence is true or false. If it is false, give the right answer.
- \(6 + 7 = 13\)
- \(15 - 9 = 7\)
6 Seashells ★★★
Mia found 11 seashells. Leo found 8 seashells. How many more seashells did Mia find?
7 Match the equation ★★★
There were 10 birds on a wire. 4 flew away. Which equation matches the story: \(10 + 4 = 14\) or \(10 - 4 = 6\)? How many birds are left?
8 Apples in a bowl ★★★
There are 6 apples in a bowl. Dad puts some more in. Now there are 14 apples. How many did Dad put in? Write an equation with \(?\).
9 Frogs on a log ★★★
Some frogs are on a log. 5 more frogs jump on. Now there are 12 frogs. How many frogs were on the log at first?
10 Cookies ★★★
Some cookies were on a plate. The children ate 6 cookies. Now 9 cookies are on the plate. How many cookies were there at first?
11 Boys and girls ★★★
17 children are in the park. 9 of them are girls. How many are boys?
12 Fewer stickers ★★★
Sam has 16 stickers. Ava has 7 fewer stickers than Sam. How many stickers does Ava have?
13 Crayon box ★★★
A box has 5 red crayons, 7 yellow crayons and 4 blue crayons. How many crayons are in the box? Add in any order you like.
14 Complete the bar model ★★★
Look at the model. The total is 18 and one part is 11.
Find the missing part and write two equations.
15 Add or subtract? ★★★
For each story, write the equation and solve it.
- 9 cats are in a yard. 8 more cats arrive.
- 18 fish are in a tank. 9 swim into a new tank.
- 7 boys and 11 girls join a club. How many children are in the club?
16 Find the missing number ★★★
Find the number that makes each sentence true.
- \(13 = 5 + ?\)
- \(9 = ? - 8\)
- \(14 - ? = 6\)
- \(? + 4 = 11\)
17 Pencils ★★★
Tom has 9 pencils. Tom has 4 more pencils than Nia. How many pencils does Nia have?
18 Make ten first ★★★
Add by making ten first.
- \(8 + 2 + 6\)
- \(7 + 3 + 5\)
19 Birds on a wire ★★★
9 birds sit on a wire. 5 more birds land. Then 7 birds fly away. How many birds are on the wire now? Solve it in two steps.
20 Find the mistake ★★★
There were 14 people on a bus. 6 people got off. Max wrote \(14 + 6 = 20\). What mistake did Max make? Give the right answer.
21 Compare with a model ★★★
Ana has 16 stickers and Raj has 11 stickers.
How many fewer stickers does Raj have than Ana? Then make up your own story for \(8 + 7 = 15\).
Test yourself: quick challenge for Grade 1
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