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Standard formIB MYP Maths Standard: Flashcards

What these 13 flashcards ask

  • What is standard form?
  • Write 150\,000\,000 in standard form.
  • Write 0.000\,007 in standard form.
  • Write 3.2\times10^{-4} as an ordinary number.
  • Is 45\times10^6 in standard form?
  • What does a negative exponent tell you about the size of a number?
  • How do you multiply two numbers in standard form?
  • How do you divide two numbers in standard form?
  • Find (2.5\times10^3)(5\times10^4).
  • Find \dfrac{1.5\times10^8}{3\times10^5}.
  • Find 3\times10^5+4\times10^4.
  • What does 1.5E8 on a calculator mean?
  • What must you do if a comes out as 12.5?

Exam questions on Standard form

  1. The Earth is about 150 000 000150\,000\,000 km from the Sun. Light travels at 3×1053\times10^{5} km per second.
    Mars is 2.28×1082.28\times10^{8} km from the Sun. Find how many times further from the Sun Mars is than the Earth. Give your answer to 2 significant figures.2 marks
  2. A red blood cell has a diameter of about 7×10−67\times10^{-6} m. A hydrogen atom has a diameter of about 1.06×10−101.06\times10^{-10} m.
    A bacterium has a length of 2.5×10−62.5\times10^{-6} m. Without a calculator, find the total length of 40004000 of these bacteria placed end to end. Give your answer in standard form, in metres.2 marks
  3. A lorry carries 2.5×1032.5\times10^{3} kg of rice. One kilogram of rice contains about 5×1045\times10^{4} grains.
    Without a calculator, find the number of grains of rice on the lorry. Give your answer in standard form.3 marks
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Written by the Exaim team, led by Shaun Daswani (Head of Upper Secondary, Improve ME Institute; MSc Financial Mathematics, Imperial College London; BSc, UCL) and Jason Daswani (operational lead, Improve ME Institute; LSE).