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Level Two > Number and Algebra

# How Many Tens And Hundreds?

Specific Learning Outcomes:

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

Solve addition and subtraction problems by using place value partitioning.

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

Description of mathematics:

Number Framework Stages 5 and 6

Required Resource Materials:
Play money (Material Master 4-9).
Activity:

### Preliminary Knowledge

The students need to know 10 hundreds make 1 thousand and vice versa, and 10

thousands make 1 ten thousand and vice versa.

### Using Materials

Problem: The Bank of Mathematics has run out of \$1000 notes. Alison wants to

withdraw \$2315 in \$1, \$10 and \$100 dollar. How many \$100 notes does she get?

Examples. Repeat for: \$2601, \$3190, \$1555, \$1209, \$2001, \$1222, \$2081….

### Using Imaging

Problem: Tickets to a concert cost \$100 each. How many tickets could you buy if you  have \$3215?

Write \$3215 on the board. Shield 3 one thousands, 2 one hundreds, 1 ten and 5 ones.

Ask the students what you can see. Discuss how many hundred dollar notes you could  get by exchanging the thousands. Discuss which notes are irrelevant (the ten and the ones).

Shielding and Imaging only: Examples. Find the number of hundreds in:

\$1608, \$2897, \$2782, \$3519, \$3091, \$4000….

### Using the Number Properties

Examples. Find the number of hundreds in: 3459, 8012, 9090, 6088, 3280, 5823,

7721, 2083….

Challenging examples. Find the number of hundreds in: 13 409, 28 002, 78 370, 12

088, 45 290, 82 356, 21 344….

Find the number of tens in: 3709, 8002, 8579, 5208, 4829, 82 333, 12 897, 30

897, 89 000, 50 890

## Saving Hundreds

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

Solve addition and subtraction problems by using place value partitioning.

## Close to 100

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

Identify symbols for any fraction, including tenths, hundredths, thousandths, and those greater than 1.

Solve addition and subtraction problems using decomposition, leading to a written algorithm

## Multiplication Smorgasboard

Solve problems using a combination of addition, subtraction, multiplication and division mental strategies.

Solve multiplication and division problems by using place value.

Solve multiplication and division problems by using tidy numbers.

## How many ten dollar notes?

Solve addition and subtraction problems by using place value.