科学计数法用英语怎么读

seven multipled by ten to the power of minus seven
7 * (10^(minus 7)) = 7.0 × 10-7
seven multipled by ten to the power of negative seven
OR
seven times ten to the negative seventh power

M,G分别是什么单位的简写？是10的几次方？

M、G都来自英语mega giga的首字母。
kilo (k)* = 10 ^ 3 = 1,000 thousand 千
mega (M) = 10 ^ 6 = 1,000,000 million 百万
giga (G) = 10 ^ 9 = 1,000,000,000 billion 十亿
tera (T) = 10 ^ 12 = 1,000,000,000,000 trillion 万亿
在计算机/通讯行业中，计算数据传送速度也使用每秒传送公制数据量来计算
1 bit (b) = 0 or 1 = one binary digit 一个二进制位元
1 kilobit(kb)=10^3 bits = 1,000 bits 一千位元
1 Megabit(Mb)=10^6 bits = 1,000,000 bits 一百万位元
1 Gigabit(Gb)=10^9 bits = 1,000,000,000 bits 一万亿位元
再有几年G不够用就开始用T了
1T＝1000G
1G＝1000M
1M＝1000k

10的3次方用英语怎么写？

10 to the power of 3 10 to the power of 6 10 to the power of 9

10的 3次方用英语怎么写?10的 6次方用英语怎么写?

10的-3次方 the minus 3th power of 10 10的-6次方 the minus 6th power of 10 以此类推