## Quiz by DoodleMaths

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20 questions
• Q1
To do 3 × 10³ + 2 × 10⁴, we work out 3000 + 20000 before converting back to standard form.
true
false
True or False
30s
• Q2
3 × 10³ + 2 × 10⁴ = 3000 + 20000 = 23000 =
23 × 10³
2.3 × 10⁴
5 × 10⁴
0.23 × 10³
30s
• Q3
5.2 × 10³ - 1.1 × 10³ = 5200 - 1100 =
4.1 × 10²
4.1 × 10³
41 × 10²
6.3 × 10³
30s
• Q4
4.8 × 10³ + 1.3 × 10² = (remember, you can convert to ordinary form to help)
6.1 × 10⁴
4.93 × 10⁵
4.93 × 10³
6.1 × 10³
30s
• Q5
6.5 × 10⁴ + 3 × 10³ = 6.8 × 10⁴
true
false
True or False
30s
• Q6
6.5 × 10⁴ - 3 × 10³ =
6.8 × 10⁴
3.5 × 10⁴
3.5 × 10³
6.2 × 10⁴
30s
• Q7
4.54 × 10³ - 3.1 × 10² =
4.33 × 10³
4.23 × 10³
1.44 × 10³
4.23 × 10⁵
30s
• Q8
7.51 × 10⁴ + 1.8 × 10³ =
7.79 × 10⁴
7.69 × 10⁵
8.59 × 10⁴
7.69 × 10⁴
30s
• Q9
1.5 × 10⁵ + 1.5 × 10⁴ = 1.65 × 10⁵
true
false
True or False
30s
• Q10
7.9 × 10⁴ - 3.0 × 10³ =
4.9 × 10¹
7.6 × 10¹
4.9 × 10⁴
7.6 × 10⁴
30s
• Q11
7 × 10³ + 2 × 10⁴ = _000 + 20000 (fill in the missing digit)
Users enter free text
30s
• Q12
6 × 10³ + 3 × 10⁴ = 6000 + 30000 = 36000 =
0.36 × 10⁵
3.6 × 10⁴
36 × 10³
3.06 × 10⁴
30s
• Q13
4.7 × 10³ - 1.2 × 10³ = 4700 - 1200 =
3.5 × 10³
35 × 10²
59 × 10²
5.9 × 10³
30s
• Q14
6.8 × 10³ + 2.3 × 10² = (remember you can convert to ordinary form to help)
7.03 × 10³
6.93 × 10³
6.1 × 10⁴
73 × 10²
30s
• Q15
8.5 × 10⁴ + 3 × 10³ = 6.8 × 10⁴
false
true
True or False
30s

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