Converting imperial units to metric units and metric units to imperial.
Finding fractions of metric units and converting from large units to small and vice versa.
Some tricky problem solving on length, weight and capacity. Also introducing Newtons.
Small items can be measured by putting several together and measuring all of them, and then dividing by the number there are. Giving measurements of length in millimetres and metres.
More on reading and interpreting scales using weight and length.
More on units of measurement and rounding to the nearest unit and tenth of a unit.
Finding the area of rectangles or, given the area, finding the lengths of the sides.
Sometimes shapes are made up of two or more rectangles. These shapes are known as compound or composite shapes. To find the area of a shape like this you need to divide it into rectangles.
When working out the surface area of a cuboid (box shape) you need to think that there are three pairs of opposite sides and each side of a pair will have the same area.
The area of a triangle equals half the base times the height.
Investigating the circumference and diameter of circles.