Addition/Subtraction with Scientific Notation

In addition and subtraction of scientific notation, what do you have to do with the exponents?

• Add the exponents

• Subtract the exponents

• Match the exponents

• Leave the exponents unchanged

Perform this operation: (8.8E15) + (3.42E16)

• 12.22E31

• 1.222E32

• 4.3E16

• 9.142E16

Perform this operation: (2.2E-22) - (4.52E-23)

• -2.32E1

• -2.32E-45

• 1.748E-22

• -4.3E-22

Perform this operation: (4.55E245) + (5.22E247)

• 5.675E247

• 5.2655E247

• 5.072E247

• 4.6022E247

Perform this operation: (8.9E13) - (7.23E11)

• 1.67E2

• 1.67E13

• -7.141E13

• 8.8277E13

Perform this operation: (2.34E-16) - (3.42E-17)

• 1.998E-16

• -1.08E1

• -1.08E-33

• -3/189E-17

Put this number in proper scientific notation: 0.92E4

• 9.2E4

• 9.2E5

• 9.2E3

• 9200

Why do we use scientific notation?

• To use powers of ten

• To use exponents

• To represent small numbers

• To represent large numbers

Write this number is proper scientific notation: 982E4

• 9.82E2

• 9.82E6

• 9.82E5

• 9.82E3

The number in front in scientific notation (not the power of 10) is always...

• greater than 1

• greater than 10

• less than 10

• less than 1