Mathematics 0580 · IGCSE · Standard form

Standard form — practice question

(a)[2]

Calculate, giving your answer in standard form, $(2.1 \times 10^{101}) \times (8 \times 10^{101})$.

(b)[2]

Calculate, giving your answer in standard form, $(2.1 \times 10^{101}) + (2.1 \times 10^{100})$.

Worked solution & mark scheme

This 4-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Final answer: $1.68\times10^{23}$.” …