Grade 4 & 5 Mental Maths Worksheets | 10 Weeks | Printables Mental Math Worksheets; Games & Activities; Multiplication Charts; Christmas Maths; Kindy. Addition; Grade 1. Grade 1 - Four Operations; Grade 1 - Addition; ... Grade 4 & 5 Mental Maths 2 has 10 weeks of mental maths with a variety of mathematical concepts. $5.00 - Purchase Checkout. Post navigation ...