A dictionary holds pairs, and you look up a key to get its value.
A dictionary is a collection of key and value pairs. You look up a key to get its value.
No counting boxes and no searching: the key leads straight to its value.
Each key may appear only once, or the lookup is unclear.
Add more columns and a dictionary becomes a table, with one row for each key.
These are some of the questions on the sets. The printable sheets have more and an answer key.
The key. You look juice up to get its price.
4 coins. Soup costs four coins in the table.
No. Each key may appear only once.
A list. The order matters, so a list fits.
3. 5 - 2 = 3.
Write the names of five family members or pets down one side of a paper and a favourite food or colour beside each. Ask a grown-up to say a name. You look it up and read the answer. Is any name used twice? What would you do?
Do the lookup Mission: write five names down one side of a paper and a favorite food beside each, then say a name for your child to look up. Ask what they would do if a name were used twice.
