Abacus Lesson 1 Simple Addition, Adding Only From Ones

Question 1

row abacus

Count up by 1s to 100

Question 2

row abacus

Count up by 2s to 200

Question 3

row abacus

Count up by 5s to 500

Question 4

row abacus

Count up by 6s to 600

Remember that 10 - 4 = 6

So 4 and 6 are big friends

Question 5

row abacus

Count up by 4s to 400

Remember that 10 - 6 = 4

So 4 and 6 are big friends

Question 6

row abacus

Count up by 3s to 300

Remember that 10 - 7 = 3

So 7 and 3 are big friends

Question 7

Introduce the ones in the column abacus

Question 8

Abacus addition

1
1

Answer 8

2

Question 9

Abacus addition

1
2

Answer 9

3

Question 10

Abacus addition

1
3

Answer 10

4

Question 11

Introduce the five in the column abacus

Question 12

Abacus addition

5
1

Answer 12

6

Question 13

Abacus addition

5
2

Answer 13

7

Question 14

Abacus addition

5
3

Answer 14

8

Question 15

Abacus addition

5
4

Answer 15

9

Question 16

Introduce the tens and fifty in the column abacus

Question 17

Abacus addition

10
10

Answer 17

20

Question 18

Abacus addition

10
20

Answer 18

30

Question 19

Abacus addition

10
30

Answer 19

40

Question 20

Abacus addition

50
10

Answer 20

60

Question 21

Use your hands to count up to 99 using the column abacus method

Question 22

Abacus addition

50
20

Answer 22

70

Question 23

Abacus addition

50
30

Answer 23

80

Question 24

Abacus addition

50
40

Answer 24

90

Question 25

Introduce the tenths in the column abacus

Question 26

Abacus addition 0.1 0.1

Answer 26

0.2

Question 27

Abacus addition 0.1 0.2

Answer 27

0.3

Question 28

Introduce the fifths in the column abacus

Question 29

Abacus addition 0.5 0.1

Answer 29

0.6

Question 30

Abacus addition 0.5 0.2

Answer 30

0.7

Question 31

Abacus addition 0.5 0.3

Answer 31

0.8

Question 32

Abacus addition 0.5 0.4

Answer 32

0.9

Question 33

Abacus addition 11.1 11.1

Answer 33

22.2

Question 34

Abacus addition 11.1 22.2

Answer 34

33.3

Question 35

Abacus addition 11.1 33.3

Answer 35

44.4

Question 36

Abacus addition 55.5 22.2

Answer 36

77.7

Question 37

Abacus addition 51.5 23.3

Answer 37

74.8