1.6 × 10⁵
To find the answer we first need to find the value of 4.2 × 10⁵ and 2.6 × 10⁵. We know that 10⁵ = 100000. Now we multiply 4.2 and 2.6 by 100000 which makes them 420000 and 260000. Now we find the difference= 420000 - 260000 = 160000. Now to put it in to scientific notation, we just divide it by 100000 so, 160000 ÷ 100000 = 1.6 × 10⁵ ( always remember to keep 10⁵ in your answer not 100000).
