All the worksheets of multiplication and division for Year 4 are available here.
National Curriculum requirements of Multiplication and Division for pupils of Year 4 are given below.

Recall multiplication and division facts for multiplication tables up to 12 × 12.

Use place value, known and derived facts to multiply and divide mentally, including: multiplying by 0 and 1; dividing by 1; multiplying together 3 numbers.

Recognise and use factor pairs and commutativity in mental calculations.

Multiply twodigit and threedigit numbers by a onedigit number using formal written layout.

Solve problems involving multiplying and adding, including using the distributive law to multiply two digit numbers by 1 digit, integer scaling problems and harder correspondence problems such as n objects are connected to m objects.