Practice sheet designed to help elementary students learn multiplication through skip counting sequences.

Problem Analysis:

The worksheet focuses on multiplication and skip counting. Let's solve each section step by step.

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Section A: Skip Counting by 2's

The sequence given is:
2, __, 6, __, __, 12, __, 16, __

Explanation:
Skip counting by 2's means adding 2 to the previous number in the sequence.

- Starting with 2:
- Next number: \( 2 + 2 = 4 \)
- Next number: \( 4 + 2 = 6 \) (already given)
- Next number: \( 6 + 2 = 8 \)
- Next number: \( 8 + 2 = 10 \)
- Next number: \( 10 + 2 = 12 \) (already given)
- Next number: \( 12 + 2 = 14 \)
- Next number: \( 14 + 2 = 16 \) (already given)
- Next number: \( 16 + 2 = 18 \)

Completed Sequence:
2, 4, 6, 8, 10, 12, 14, 16, 18

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Section B: Skip Counting by 5's

The sequence given is:
5, __, 15, __, __, 30, __, __, __

Explanation:
Skip counting by 5's means adding 5 to the previous number in the sequence.

- Starting with 5:
- Next number: \( 5 + 5 = 10 \)
- Next number: \( 10 + 5 = 15 \) (already given)
- Next number: \( 15 + 5 = 20 \)
- Next number: \( 20 + 5 = 25 \)
- Next number: \( 25 + 5 = 30 \) (already given)
- Next number: \( 30 + 5 = 35 \)
- Next number: \( 35 + 5 = 40 \)
- Next number: \( 40 + 5 = 45 \)

Completed Sequence:
5, 10, 15, 20, 25, 30, 35, 40, 45

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Section C: Skip Counting by 10's

The sequence given is:
10, __, 30, __, __, __, __, __, 100

Explanation:
Skip counting by 10's means adding 10 to the previous number in the sequence.

- Starting with 10:
- Next number: \( 10 + 10 = 20 \)
- Next number: \( 20 + 10 = 30 \) (already given)
- Next number: \( 30 + 10 = 40 \)
- Next number: \( 40 + 10 = 50 \)
- Next number: \( 50 + 10 = 60 \)
- Next number: \( 60 + 10 = 70 \)
- Next number: \( 70 + 10 = 80 \)
- Next number: \( 80 + 10 = 90 \)
- Next number: \( 90 + 10 = 100 \) (already given)

Completed Sequence:
10, 20, 30, 40, 50, 60, 70, 80, 90, 100

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Section D: Write the Correct Answer

This section involves basic multiplication problems. Let's solve each one:

#### a) \( 2 \times 5 = \)
\[ 2 \times 5 = 10 \]

#### b) \( 4 \times 2 = \)
\[ 4 \times 2 = 8 \]

#### c) \( 5 \times 10 = \)
\[ 5 \times 10 = 50 \]

#### d) \( 8 \times 5 = \)
\[ 8 \times 5 = 40 \]

#### e) \( 7 \times 2 = \)
\[ 7 \times 2 = 14 \]

#### f) \( 6 \times 10 = \)
\[ 6 \times 10 = 60 \]

#### g) \( 4 \times 5 = \)
\[ 4 \times 5 = 20 \]

#### h) \( 3 \times 2 = \)
\[ 3 \times 2 = 6 \]

#### i) \( 7 \times 5 = \)
\[ 7 \times 5 = 35 \]

#### j) \( 2 \times 10 = \)
\[ 2 \times 10 = 20 \]

#### k) \( 4 \times 10 = \)
\[ 4 \times 10 = 40 \]

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Final Answers:

#### Section A:
\[ \boxed{4, 8, 10, 14, 18} \]

#### Section B:
\[ \boxed{10, 20, 25, 35, 40, 45} \]

#### Section C:
\[ \boxed{20, 40, 50, 60, 70, 80, 90} \]

#### Section D:
\[ \boxed{10, 8, 50, 40, 14, 60, 20, 6, 35, 20, 40} \]