Te Kete Ipurangi
Communities
Schools

### Te Kete Ipurangi user options:

Level Two > Number and Algebra

# Something's Hiding!

Purpose:

In this activity the purpose is to find out how many tens and ones blocks are hidden from a given total.

Specific Learning Outcomes:

solve subtraction problems

Required Resource Materials:
Place value blocks, tens and ones
Blackboard or whiteboard
Activity:
1. Show the students you have put blocks on the OHP to represent a number but some of them are hiding (covered). Ask them to work out how many are hiding.

All my blocks together show 78, but some of them are hiding.
How many are hiding?

1. After a time for thinking, have students share their answers and their thinking, recording some of these on the board.
2. Uncover the hiding blocks, and count them to show students both the number hiding and the total number.
3. Repeat the activity with a different number of blocks hidden.

## Loopy

Recall addition and subtraction facts to 20.

Recall the multiplication and division facts for the multiples of 2, 3, 5, and 10.

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

## Bowl a Fact

Recall addition and subtraction facts to 20.

Recall the multiplication and division facts for the multiples of 2, 3, 5, and 10.

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

## Bridges

Recall addition and subtraction facts to 20.

## Number Mats and Number Fans

Recall addition and subtraction facts to 20.

Recall the multiplication and division facts for the multiples of 2, 3, 5, and 10.

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

## Patterns to 10

Recall the facts up to 10, and the teen facts.