IB Maths AI HL 1.1 Scientific Notation Question Bank

Practise IB Maths AI HL 1.1 by converting contextual calculations into scientific notation with a normalised mantissa, integer exponent, and correct units.

Exam points

Convert final answers to a × 10ᵏ with 1 ≤ a < 10 and integer k, preserving units.
Use scientific notation in contextual calculations such as area, entropy and repeated revolutions.

[Maximum number: 3]

Zaha is designing a bridge to cross a river. She believes that the weight of the steel needed for this bridge is approximately 53632000 kg .
The exact weight of the steel needed for the bridge is 55625000 kg .

Write down your answer to part (b)(i) in the form $a \times 10^{k}$ , where $1 \leq a<10$ , $k \in \mathbb{Z}$ .

$2.78 \times 10^{8}$

Note: Award A1 for correct mantissa, consistent with their answer in part (b)(i).

Marking guidance:

Award A1 for a correct exponent, consistent with their answer in part (b)(i).
Award AOAO for answers such as $27.8 \times 10^{7}$ .

All question bank results loaded

SL 1.1—Scientific notation question 1