keisan
math story
what is the same?
missing number
puzzle
100

11 - 2

9

100

There are 11 monkeys.

9 monkeys go away.

How many monkeys are left?

11 - 9 = 2

2 monkeys

100

Which one is the same as 11 - 8?

12 - 9               15 - 3

12 - 9

100

10 - __ = 8

2

100
Keiko - Kotoko = ___________

Sana

200

14 - 9

5

200

I have 15 candies.

I eat 8 candies.

How many are candies are left?

15 - 8 = 7

7 candies

200

Which one is the same as 12 - 6?

13 - 7               13 - 4

13 - 7

200

11 - __ = 8

3

200

Minato - Kenyu = ___________

Sayuri

300

17 - 8

9

300

There are 12 pets.

9 pets are cats.

How many are dogs?

12 - 9 = 3

3 dogs

300

Which one is the same as 14 - 9

16 - 8                          13 - 8               

13 - 8

300

12 - __ = 8

4

300

Asa - Kentaro = ___________

Rikuto

400

14 - 7

7

400

There are 18 fruits.

9 fruits are apples.

How many are bananas?

18 - 9 = 9

9 bananas

400

Which one is the same as 17 - 8

12 - 3                          12 - 4      

12 - 3

400

13 - __ = 8

5

400

Fu - Mahiro = ____________

Kentaro

500

13 - 6

7

500

Sumire class has 7 acorns.

Yuri class has 12 acorns.

What's the difference between Yuri classes and Sumire classes acorns?

12 - 7 = 5

5 acorns

500

Which one is the same as 19 - 10

13 - 5                               13 - 4      

13 - 4

500

14 - ___ = 8

6

500

Miho - Yuika = _________________

Yuma