I rather like these two worksheets for year 4 children. After the question there ia a table to complete which asks not just for the answer, but also for other information.
The Operation box requires what method was used: addition, subtraction, multiplication or division.
The Method box requires how it was done; either mentally or on paper eg “I did this in my head because I know my 4 times table.”
The How box asks for the reason why the method was used: eg ” I divided by 4 because there were 4 equal chapters”.
This really makes children think what they are doing and is a great aid later when asked to explain orally their methods.
Free Y4 maths worksheet: Choose the operation and the method (pg 3)
Free Y4 maths worksheet: Choose the operation and the method (pg 4)