Sonni standart shaklga keltiring: $225\cdot 10^{-7}$
- A. $2{,}25\cdot 10^{-3}$
- B. $2{,}25\cdot 10^{-5}$
- C. $2{,}25\cdot 10^{-4}$
- D. $2{,}25\cdot 10^{-6}$
Daraja va uning xossalari, darajali ifodalar bo‘yicha savol
Javob va yechimni ko‘rish
Javob: 2{,}25\cdot 10^{-5}
$225\cdot 10^{-7}$ sonini standart (ilmiy) ko‘rinishga keltirish uchun koeffitsient $1$ bilan $10$ ning birinchi darajasi orasida bo‘lishi kerak, ya’ni $1\le a<10$ bo‘lishi lozim.
$225$ ni $10$ ga bo‘lish orqali $2,25$ ga kamaytiramiz: $225 = 2,25\cdot 10^{2}$.
Shu ifodani asl ko‘paytma bilan birga yozsak
\[
225\cdot 10^{-7}= (2,25\cdot 10^{2})\cdot 10^{-7}=2,25\cdot 10^{2-7}=2,25\cdot 10^{-5}.
\]
Natijada son standart shaklda $2,25\cdot 10^{-5}$ bo‘ladi, ya’ni to‘g‘ri javob **B**.
Mavzuni mustahkamlang
Bu savol Daraja va uning xossalari, darajali ifodalar mavzusiga tegishli. Ta’riflar, formulalar va misollarni mavzu sahifasida ko‘ring.
Mavzuni o‘rganish