Answer all questions carefully. You have three chances at this quiz.

# numbers

## Compatible Numbers

**What are compatible numbers?**Compatible numbers are numbers that are easy to compute using the four basic operations: addition, subtraction, multiplication, or division. Compatible numbers help you do mental math. It involving rounding numbers to the nearest tens, hundreds, thousands, or ten thousand. For this reason it helps in solve estimating questions.

**Example**:

Find the sum of 512 and 419.

To solve this we must first round the numbers to the nearest tens or hundreds. In this example we round it up to the nearest tens.

Let do some questions using the four basic operations.

## Addition and Subtraction 3

Answer all questions.

## Quiz 2 – Mathematics

Answer all following questions. You have

## Number Pattern – Word Problems

Answer the following questions.

## Number Pattern 3

Exercise to create number patterns.

## Number Pattern 2

Pattern

Answer the following questions.

## Quiz 1- Mathematics

This quiz is timed and is limited to 5 trials. Answer all the questions before you submit.

## Rounding

This exercise will focus on rounding off whole number to the nearest ten, hundred, and thousand. View the videos before you start the exercise.

Rounding to the nearest ten

Rounding to the nearest Hundred

## Large and Small

Practice exercise.

## Expanded Notation

Even though the numeral **4 457** is a large number, it can be read as:

4 000 and 400 and 50 and 7.

4 000 + 400 + 7

The expanded form for the number** 4 457** can also look like this:

(4 x 1000) + (4 x 100) + (5 x 10) + (7)

Note:

There is a difference between the value of a digit and the amount of say hundreds or tens or even ones in a number.

For example: How many hundreds are there in the numeral 2307?

Observe that the question states hundreds. So there are 23 hundreds in the numeral 2307.

Time for some questions:

## Place Value (up to 10000)

Answer all the questions.

## Numbers 2 (PV to 999)

Answer all the questions.

## Ascending and Descending (up to 10,000)

Answer all the questions.

## Addition 3

Practice

## Numbers – Ascending, Descending

Review

## Money and Number Names

Consolidate

## Review 3

Quiz is testing expanded form, place value, addition and subtraction.

## Notation 2

Our numeration system is based on the decimal system or base 10. You have learnt that the place value of the digits in any numeral in base 10 increases 10 times from right to left, and decreases 10 times from left to right.

So:

Numeral: 24 = (2 x 10) + (4 x 1)

Numeral: 524 = (2 x 100) + (2 x 10) + (4 x 1)

Separating digits in this manner is called expanded notation.

Consider:

28,472 = (2 x 10,000) + (8 x 1,000) + (4 x 100) + (7 x 10) + (2 x 1)

23472 = 20,000 + 8,000 + 400 + 70 + 2

Practice:

## Addition and Subtraction – Problem Solving

Consolidation

## Division (with decimals)

Dividing decimal number by whole numbers is much like dividing whole numbers.

Practice.

Don’t forget the decimal point.

## Changing Words to Decimals

Review.

## Multiplication

Multiply as you will whole numbers. Count the number of decimal places and place the decimal properly in the product.

Practice.

## Subtracting Numbers with Decimals

You line up the decimal points vertically to subtract numbers with decimals. The subtract as you would with whole numbers.

Sometimes you need to put zeroes to the right of the decimal point as place holders.