Adding two numbers in standard form
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Lesson details
Key learning points
- In this lesson, we will learn how to add any two numbers together in standard form. We will look at initial cases where powers are equal, and move to more complicated cases where powers are different.
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3 Questions
Q1.
Write 4 x 10⁻³ in ordinary form.
-0.000004
0.000004
0.0004
Q2.
Write 2.05 x 10⁻⁶ in ordinary form.
0.0000205
0.000205
0.00205
Q3.
Which number is smaller? 5 x 10⁻⁴ or 4 x 10⁻⁵
5 x 10⁻⁴
5 Questions
Q1.
1. Work out (2.7 × 10⁶) + (7.3 × 10⁶). Give your answer in standard form.
1 × 10³
10 × 10¹²
10 × 10⁶
Q2.
2. Calculate (4 × 10³) + (4 × 10⁴), give your answer in standard form.
4.4 × 10³
8 × 10³
8 × 10⁴
Q3.
3. Work out (3 × 10⁴) + (4 × 10⁵), give your answer in standard form.
3.4 × 10⁴
4.3 × 10⁴
7 × 10⁴
Q4.
4. Calculate (4.1 × 10⁶) + (3.2 × 10⁵), giving your answer in standard form.
4.42 × 10¹¹
7.3 × 10¹¹
7.3 × 10⁵
Q5.
5. Work out (5 × 10¹) + (5 × 10⁻¹), giving your answer in standard form.
0
10
5.05 × 10¹