# Subtracting two numbers in standard form

In this lesson, we will learn how to subtract any two numbers in standard form. We will look at initial cases where powers are equal, and move to more complicated cases where powers are different.

Quiz:

# Intro quiz - Recap from previous lesson

Before we start this lesson, let’s see what you can remember from this topic. Here’s a quick quiz!

Q1.Work out (2.7 × 10⁶) + (7.3 × 10⁶). Give your answer in standard form.

1/5

Q2.Calculate (4 × 10³) + (4 × 10⁴), give your answer in standard form.

2/5

Q3.Work out (3 × 10⁴) + (4 × 10⁵), give your answer in standard form.

3/5

Q4.Calculate (4.1 × 10⁶) + (3.2 × 10⁵), giving your answer in standard form.

4/5

Q5.Work out (5 × 10¹) + (5 × 10⁻¹), giving your answer in standard form.

5/5

Quiz:

# Intro quiz - Recap from previous lesson

Before we start this lesson, let’s see what you can remember from this topic. Here’s a quick quiz!

Q1.Work out (2.7 × 10⁶) + (7.3 × 10⁶). Give your answer in standard form.

1/5

Q2.Calculate (4 × 10³) + (4 × 10⁴), give your answer in standard form.

2/5

Q3.Work out (3 × 10⁴) + (4 × 10⁵), give your answer in standard form.

3/5

Q4.Calculate (4.1 × 10⁶) + (3.2 × 10⁵), giving your answer in standard form.

4/5

Q5.Work out (5 × 10¹) + (5 × 10⁻¹), giving your answer in standard form.

5/5

# Video

Click on the play button to start the video. If your teacher asks you to pause the video and look at the worksheet you should:

• Click "Close Video"
• Click "Next" to view the activity

Your video will re-appear on the next page, and will stay paused in the right place.

# Worksheet

These slides will take you through some tasks for the lesson. If you need to re-play the video, click the ‘Resume Video’ icon. If you are asked to add answers to the slides, first download or print out the worksheet. Once you have finished all the tasks, click ‘Next’ below.

Quiz:

# Subtracting Two Numbers in Standard Form

Don’t worry if you get a question wrong! Forgetting is an important step in learning. We will recap next lesson.

Q1.Work out (9 × 10⁶) - (3 × 10⁶). Give your answer in standard form.

1/5

Q2.Calculate (6.4 × 10³) - (2.3 × 10³). Give your answer in standard form.

2/5

Q3.Work out (3 × 10⁷) - (4 × 10⁶), give your answer in standard form.

3/5

Q4.Calculate (4.1 × 10⁻²) - (3.2 × 10⁻³), giving your answer in standard form.

4/5

Q5.Work out (7 × 10⁵) - (5 × 10²), giving your answer in standard form.

5/5

Quiz:

# Subtracting Two Numbers in Standard Form

Don’t worry if you get a question wrong! Forgetting is an important step in learning. We will recap next lesson.

Q1.Work out (9 × 10⁶) - (3 × 10⁶). Give your answer in standard form.

1/5

Q2.Calculate (6.4 × 10³) - (2.3 × 10³). Give your answer in standard form.

2/5

Q3.Work out (3 × 10⁷) - (4 × 10⁶), give your answer in standard form.

3/5

Q4.Calculate (4.1 × 10⁻²) - (3.2 × 10⁻³), giving your answer in standard form.

4/5

Q5.Work out (7 × 10⁵) - (5 × 10²), giving your answer in standard form.

5/5

# Lesson summary: Subtracting two numbers in standard form

## Time to move!

Did you know that exercise helps your concentration and ability to learn?

For 5 mins...

Move around:
Climb stairs

On the spot:
Dance