Question

(4, 5×10^7)-(4,05 ×10^7)

Answer 1

$(4.5 \times {10}^{7}) - (4.05 \times {10}^{7}) =0.45 × 10^7 = 4.500.000$

Answer 2

$(4.5 \times {10}^{7} ) - (4.05 \times {10}^{7} ) =$
(4.5 × 10000000) - (4.05 × 10000000) = 45000000 - 40500000 = 4500000