A chart with about a third of the numbers missing, a chart where only the first number of each row is given, or a full chart for skip counting by 2s, 5s or 10s.

1 to 100 or 1 to 120?

Foundation works with numbers to at least 20, and Year 1 to at least 120, so the 1 to 120 chart covers the whole of Year 1.

Are answer keys included?

Yes, and every version of a missing-numbers chart has different blanks.

Hundreds Chart Worksheets: Missing Numbers, Fill-In and Skip Counting

Patterns in the hundreds chart

Down a column every number grows by ten; along a row, by one. Filling in missing numbers makes children use those patterns instead of counting from 1 every time.

More counting

Try skip counting and number lines.

In the Australian Curriculum

Year 1Recognising, representing and ordering numbers to at least 120 using numerals, number lines and charts (AC9M1N01).
Year 1Skip counting to find how many are in collections to at least 120 (AC9M1N03).
Year 2Ordering numbers to at least 1000, where the same patterns of tens carry on past 100.

Charts are named in the Year 1 content description itself, and the 1 to 120 chart matches it exactly. Going past 100 matters: children who meet 104 and 117 on the chart are less likely to write them as 1004 or 10017.

In Foundation the curriculum focuses on numbers to at least 20, so a full hundreds chart is more of a counting-aloud tool there. The missing-numbers charts fit Year 1 best, when children can use the tens and ones patterns to work out a gap.

Summarised in our own words from the Australian Curriculum: Mathematics, Version 9.0 (ACARA).