Adding and subtracting ones, tens and hundreds mentally is one of the year 3 maths objectives. This is where a good understanding of place value really helps too! This game is really simple but a fun way to practice this skill rather than just answering questions from a worksheet or textbook! #letthemplay #playinupperprimary #playbasedlearning #teachingideas #mathsgames #ks2 | Playful Learning Games