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Level Two > Number and Algebra

# Tens and Ones

Keywords:
Specific Learning Outcomes:

Recall the number of tens and hundreds in 100s and 1000s.

Description of mathematics:

Number Framework Stage 5

Required Resource Materials:
Material suitable for bundling into tens. E.g. sticks with rubber bands, BeaNZ in canisters
Place it game (Material Master 4-32)
Activity:

The students amass loose objects into groups of 10. For example, “At Jack’s bean shop, they put beans into containers of 10 to make counting easier.” or, “Mr Manuka sells sticks to the three little pigs in bundles of 10.” The students write the answers down as two-digit numbers.

Reverse the process: Write a small two-digit number, like 37, on the board or modelling book and get the students to collect that number of sticks or beans or cubes. “How many bundles/ containers/stacks of 10 can you make?”

Do some “teen” numbers. The problem with the “teen” numbers is that the 10 (teen) is said after the ones, unlike all other two-digit numbers, but this cannot be avoided. It needs constant repetition until the students know the teen numbers reliably.

#### Activity

The students choose two-digit numbers from the hundreds board, and model them with sticks/ beans/cubes. The students play Place It to consolidate grouping in tens and ones.

## Dividing? Think about Multiplying First

Recall multiplication to 10 x 10, and the corresponding division facts.

Recall groupings of twos, threes, fives, and tens that are in numbers to 100 and the resulting remainders.

## Number Boggle

Recall addition and subtraction facts to 20.

## Tens in Hundreds and More

Recall the number of tens and hundreds in 100s and 1000s.

Recall groupings of twos, threes, fives, and tens that are in numbers to 100 and the resulting remainders.

Find out how many ones, tens, hundreds and thousands are in all of a whole number.

Find the number of tenths, hundredths, and one–thousandths in numbers of up to three decimal places.