# Step 4

Difficulty 4

 1 Show Time 1 - calculate duration in hours 2 Bus Stop Blues 1 - calculate arrival time given timetable and delay 3 Happy Birthday 2: 10 years in weeks, more or less than 500 4 Take the Plunge - 40 minutes after 3:30pm 5 Oscar's Orange Operation - subtract 2x300mL from 2L 6 Oscar's Orange Operation - subtract 3x250mL from 2L 7 Oscar's Orange Operation - subtract 3x200mL from 1L 8 In writing... - equivalent to one and one-quarter litres 9 Jug-O-Fun - 125mL cups in 1500mL 10 Jug-O-Fun - 500mL cups in 2500mL 11 Volume - Voluptuous Volumes 6 12 Volume - Voluptuous Volumes 5 13 Jug-O-Fun - 250mL cups in 2000mL 14 Lunch Time - subtracting mL to make 1L 15 Lunch Time - adding mL to make 1L 16 Ordering By Area - order 4 objects by area, using 1 square centimetre grid 17 Approximating Area - to nearest whole number, using 1 square centimetre grid 18 Doing Part Of The Square - three quarters coloured 19 Derry's Door - expressing 1 square metre 20 Spot The Cheetah - compare/convert length in cm and m 21 Pace Out the Bounds 4 - side length given perimeter of square, whole m 22 Lengthy Issues 12 - select appropriate unit for given measurement; mm, cm or m 23 Lengthy Issues 10 - select appropriate unit for given measurement; mm, cm or m 24 Made to Measure 3 - select most appropriate unit of measure; mm, cm, m or km 25 Made To Measure 1 - select most appropriate unit of measure; mm, cm, m or km 26 Mass Confusion - select correct unit; g, kg or t 27 Mass Confusion: Select correct unit, g, kg or t 28 Farmer Arnie's Weights - rounding up to whole kg and t 29 Farmer Arnie's Weights - rounding up to whole kg and t 30 Round the Campfire - select appropriate mass unit 31 Round the Campfire - select appropriate mass unit 32 Round the Campfire - select appropriate mass unit 33 A Scaly Problem - read mass in kg from scale 34 A Scaly Problem - read mass in g from scale 35 A Scaly Problem - read mass in fractions of a kg from scale, 1 decimal place