Math Games

Year 5 - Number and Algebra

Standard 5.OA.1.1 - Estimate which sign makes the inequality true by first rounding the division problem numbers to the nearest numbers that divide evenly.

Included Skills:

Number and place value
• Identify and describe factors and multiples of whole numbers and use them to solve problems
- exploring factors and multiples using number sequences
- using simple divisibility tests
• Use estimation and rounding to check the reasonableness of answers to calculations
- recognising the usefulness of estimation to check calculations
- applying mental strategies to estimate the result of calculations, such as estimating the cost of a supermarket trolley load
• Solve problems involving multiplication of large numbers by one- or two-digit numbers using efficient mental, written strategies and appropriate digital technologies
- exploring techniques for multiplication such as the area model, the Italian lattice method or the partitioning of numbers
- applying the distributive law and using arrays to model multiplication and explain calculation strategies
• Solve problems involving division by a one digit number, including those that result in a remainder
- using the fact that equivalent division calculations result if both numbers are divided by the same factor
- interpreting and representing the remainder in division calculations sensibly for the context
• Use efficient mental and written strategies and apply appropriate digital technologies to solve problems
- using calculators to check the reasonableness of answers