Look at the ones row. Four or fewer fall back. Five or more slide up.
Rounding to the nearest ten finds the ten that is closest to a number.
Picture a hill between two tens. A ball on the hill rolls to the nearer ten.
On the frame, look at the ones row. Four ones or fewer slide back, and five or more slide up to the next ten.
Exactly five ones sit halfway, and the rule is that five or more goes up.
These are some of the questions on the sets. The printable sheets have more, with the bead frame drawn for each, and an answer key.
40. Three ones are few, so they fall back to the ten below.
60. Seven ones are many, so they slide up to the next ten.
90. Five ones go up to the next ten.
60. One one is few, so it falls back.
Ask a grown-up to help you find three prices, on a receipt or a shop leaflet. For each one, look at the ones and decide: does it fall back to the ten below, or slide up to the next ten? Then say it in a sentence, like 'about thirty'.
Find three prices on a receipt or a leaflet. For each one, look at the ones and say if it falls back or slides up, then say it as a sentence, like about thirty.
