Base 10 review

5.697 x 100

0.0089 x 10^3=

4.506 ÷ 100=

39.12 ÷ 10^4=

Answer explanation

The exponent 5 tells us we need to multiply 2 by itself 5 times. 2x2=4, 4x2=8, 8x2=16, 16x2=32 for a total of five 2s.

Which are the correct expanded forms of: 45,386.089?

• 4x10⁵+5x10⁴+

  3x10³+8x10²+

  6x10¹+0x10^-1+

  8x10^-2+9x10^-3

• 4x10⁴+5x10³+

  3x10²+8x10¹+

  6x10⁰+0x10¹+

  8x10²+9x10³

• 4x10⁴+5x10³+

  3x10²+8x10¹+

  6x10⁰+0x10^-1+

  8x10^-2+9x10^-3

• (4x10⁴)+(5x10³)+(3x10²)+(8x10¹)+(6x10⁰)+(0x10^-1)+(8x10^-2)+(9x10^-3)

256x100=

12x8,000=

203.87 + 1.2934=

201.03 - 198.148=