addition
Tom has 12 red balloons and 8 blue balloons.
Later, he gets 5 more balloons.
How many balloons does Tom have now?
12 + 8 = 20
20 + 5 = 25 balloons
There are 30 apples in a basket.
10 apples are eaten, and later 5 more apples are eaten.
How many apples are left?
30 − 10 = 20
20 − 5 = 15 apples
There are 24 birds on a tree.
18 more birds fly to the tree.
Later, 12 more birds fly to the tree.
24 + 18 = 42
42 + 12 = 54 birds
3x9
27
There are 15 birds in a tree and 10 birds on the ground.
Then 7 more birds fly to the tree.
How many birds are there altogether?
15 + 10 = 25
25 + 7 = 32 birds
Tom has 40 marbles.
He gives 12 marbles to a friend and then 8 marbles to another friend.
How many marbles does Tom have left?
40 − 12 = 28
28 − 8 = 20 marbles
There are 65 balloons in a shop.
23 balloons are sold in the morning.
Later, 17 more balloons are sold.
65 − 23 = 42
42 − 17 = 25 balloons
9x9
81
Lily reads 18 pages in the morning and 12 pages in the afternoon.
After dinner, she reads 10 more pages.
How many pages did Lily read in one day?
18 + 12 = 30
30 + 10 = 40 pages
There are 50 balloons at a party.
15 balloons pop, and later 10 more balloons pop.
How many balloons are left?
50 − 15 = 35
35 − 10 = 25 balloons
A box has 40 pencils.
25 more pencils are added.
Then 18 pencils are taken away.
40 + 25 = 65
65 − 18 = 47 pencils
6x7
42
A toy shop sells 24 toy cars in the morning and 16 toy cars in the afternoon.
Later, they sell 20 more toy cars.
How many toy cars did they sell in total?
24 + 16 = 40
40 + 20 = 60 toy cars
A classroom has 60 pencils.
18 pencils are used in the morning, and 22 pencils are used in the afternoon.
How many pencils are left?
60 − 18 = 42
42 − 22 = 20 pencils
There are 90 students in the hall.
36 students leave.
Then 14 students come in.
90 − 36 = 54
54 + 14 = 68 students
15x3
45
There are 35 students in Grade 2A and 27 students in Grade 2B.
Then 18 more students join for an assembly.
How many students are there altogether?
35 + 27 = 62
62 + 18 = 80 students
A toy store has 85 toys.
27 toys are sold in the morning, and 38 toys are sold in the afternoon.
How many toys are left?
85 − 27 = 58
58 − 38 = 20 toys
A toy store sells 32 toys in the morning.
28 toys are sold in the afternoon.
Later, 15 more toys are sold.
32 + 28 = 60
60 + 15 = 75 toys
8x8
64