First Law of Indices

- If there is no visible sign before a number, the invisible sign is PLUS e.g. 8 means +8
- If two numbers have the same signs in front of them, the answer has that sign and you ADD the two numbers e.g. -1-2=-3 and 4+3=7
- If two numbers have opposite signs in front of them, the answer has the sign of the larger number and you SUBTRACT the smaller number from the larger number e.g. 4-7=-3 and 8-7= 1
- If the two numbers are equal in value but have different signs in front of them, then the result is zero e.g. -9+9= 0 and 15-15=0

Related to Sample Lesson

Each question has five choices. Click one of the choices to select your answer. You may change an answer at any time by simply clicking another choice. Click FINISH when you have completed your answers.

First Law of Indices

813 expressed in words is

Eight hundred and thirteen thousand

Eight million, one thousand and 3

Eight thousand, one hundred and three

Eight thousand, one hundred and thirty

Eight hundred and thirteen

2,002 expressed in words is

Twenty two

Two hundred and two

Two thousand and two

Two thousand, two hundred

None of the given choices

Describe in words the third innum of the whole number 25,301,600.

Twenty five million

Three hundred and one

Six hundred

Three

None of the choices

How would you write the whole number 9 009 909 in words?

Nine billion, nine million, nine hundred and nine

Nine trillion, nine thousand, nine thousand and nine

Nine million, nine thousand, nine hundred and nine

Nine hundred and nine thousand, nine hundred and nine

Nine, zero, zero, nine, nine, zero, nine

1,331 expressed in words is

One thousand, three hundred and thirty one

One million, three thousand, three hundred and one

Thirteen thousand and thirty one

One trillion, three billion, three million, one thousand

None of the above

25,000,000,001 expressed in words is

Two hundred and fifty one

Twenty five trillion and one

Twenty five million and one

Twenty five billion and one

Twenty five thousand and one

How would you write the whole number 91 000 000 000 105 in words?

Nineteen trillion, one thousand, and five

Nine billion, one million, one hundred and five

Ninety million, one hundred thousand and five

Ninety one trillion, one hundred and five

Nine trillion, one billion, one million and five thousand

999 expressed in words is

Nine million, nine thousand and nine

Nine thousand, nine hundred and nine

Nine hundred and nine

Ninety nine

Nine hundred and ninety nine

Describe in words the first innum of the whole number 873 102 497 896 325.

Eight hundred and seventy three

One hundred and two

Four hundred and ninety seven

Eight hundred and ninety six

None of the choices

Describe in words the last innum of the whole number 34,365,157,901.

Three hundred and sixty five million

Thirty four billion

One hundred and fifty seven thousand

Nine hundred and one

None of the choices