# Know Your Numbers: Jumping Backwards in Twos (2)

In this worksheet, students count back in twos and complete the numbers in a sequence.

Key stage:  KS 1

Curriculum topic:   Number: Number and Place Value

Curriculum subtopic:   Count in Steps (2, 3, 5 and 10)

Difficulty level:

### QUESTION 1 of 10

Freddie the frog loves jumping around on number lines. He always likes to make a clever number sequence. Use your finger to follow the jumps that he makes.

Example:

Count the frog's jumps to work out missing numbers in the sequence.

Pop your finger on the first number, then follow the jumps. Are the numbers getting bigger or smaller? Is Freddie going backwards or forwards? Can you see a pattern? What could the missing number be? What could the next number be?

 21 19 17 15 A B

A = 13

B = 11

Count the frog's jumps to work out missing numbers in the sequence.

 19 17 15 13 a b
a=11 and b=9

a=11 and b=10

a=9 and b=13

Count the frog's jumps to work out missing numbers in the sequence.

 21 19 17 15 a b
a=13 and b=11

a=11 and b=10

a=9 and b=13

Count the frog's jumps to work out missing numbers in the sequence.

 15 13 11 9 a b
a=5 and b=7

a=7 and b=5

a=10 and b=9

Count the frog's jumps to work out missing numbers in the sequence.

 22 20 18 16 a b
a=14 and b=12

a=12 and b=14

a=15 and b=14

Count the frog's jumps to work out missing numbers in the sequence.

 23 21 19 17 a b
a=15 and b=13

a=13 and b=15

a=13 and b=12

Count the frog's jumps to work out missing numbers in the sequence.

 14 12 10 8 a b
a=7 and b=5

a=5 and b=6

a=6 and b=4

Count the frog's jumps to work out missing numbers in the sequence.

 18 16 14 12 a b
a=10 and b=8

a=8 and b=10

a=11 and b=10

Count the frog's jumps to work out missing numbers in the sequence.

 20 18 16 14 a b
a=12 and b=10

a=13 and b=12

a=10 and b=12

Count the frog's jumps to work out missing numbers in the sequence.

 17 15 13 11 a b
a=9 and b=7

a=10 and b=9

a=12 and b=10

Count the frog's jumps to work out missing numbers in the sequence.

 13 11 9 7 a b
a=7 and b=5

a=5 and b=3

a=3 and b=1

• Question 1

Count the frog's jumps to work out missing numbers in the sequence.

 19 17 15 13 a b
a=11 and b=9
EDDIE SAYS
19, 17, 15, 13, 11, 9 is the sequence.
Freddie is jumping backwards 2 places each time.
• Question 2

Count the frog's jumps to work out missing numbers in the sequence.

 21 19 17 15 a b
a=13 and b=11
EDDIE SAYS
21, 19, 17, 15, 13, 11 is the sequence.
Freddie is jumping backwards 2 places each time.
• Question 3

Count the frog's jumps to work out missing numbers in the sequence.

 15 13 11 9 a b
a=7 and b=5
EDDIE SAYS
15, 13, 11, 9, 7, 5 is the sequence.
Freddie is jumping backwards 2 places each time.
• Question 4

Count the frog's jumps to work out missing numbers in the sequence.

 22 20 18 16 a b
a=14 and b=12
EDDIE SAYS
22, 20, 18, 16, 14, 12 is the sequence.
Freddie is jumping backwards 2 places each time.
• Question 5

Count the frog's jumps to work out missing numbers in the sequence.

 23 21 19 17 a b
a=15 and b=13
EDDIE SAYS
23, 21, 19, 17, 15, 13 is the sequence.
Freddie is jumping backwards 2 places each time.
• Question 6

Count the frog's jumps to work out missing numbers in the sequence.

 14 12 10 8 a b
a=6 and b=4
EDDIE SAYS
14, 12, 10, 8, 6, 4 is the sequence.
Freddie is jumping backwards 2 places each time.
• Question 7

Count the frog's jumps to work out missing numbers in the sequence.

 18 16 14 12 a b
a=10 and b=8
EDDIE SAYS
18, 16, 14, 12, 10, 8 is the sequence.
Freddie is jumping backwards 2 places each time.
• Question 8

Count the frog's jumps to work out missing numbers in the sequence.

 20 18 16 14 a b
a=12 and b=10
EDDIE SAYS
20, 18, 16, 14, 12, 10 is the sequence.
Freddie is jumping backwards 2 places each time.
• Question 9

Count the frog's jumps to work out missing numbers in the sequence.

 17 15 13 11 a b
a=9 and b=7
EDDIE SAYS
17, 15, 13, 11, 9, 7 is the sequence.
Freddie is jumping backwards 2 places each time.
• Question 10

Count the frog's jumps to work out missing numbers in the sequence.

 13 11 9 7 a b
a=5 and b=3
EDDIE SAYS
13, 11, 9, 7, 5, 3 is the sequence.
Freddie is jumping backwards 2 places each time.
---- OR ----

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