Use approximation through rounding to estimate answers and calculate possible resulting errors expressed using inequality notation a < x ≤ b; understand upper and lower bounds of rounded values
A first look
This shelf is still being planted — the questions are being written and checked. Come back soon. A Skill needs at least 5 checked questions before it opens here.
Question 1 of 3
What is the binary representation of the decimal number 45?
Question 2 of 3
What is the decimal equivalent of the binary number 101101?
Question 3 of 3
A carpenter measures one wooden plank to be 12.7 cm long. She rounds each measurement to the nearest whole centimeter to estimate the total length of 23 planks placed end‑to‑end. Write an inequality that gives all possible values of the total length L (in centimeters) of the 23 planks.
Be first to know when it opens
A free account shows every Skill on the map as it opens — and practises the 37 Number Representation & Place Value Skills that are ready today. Every student account needs a parent's email first.