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

20 expressed in words is

Two

Two thousand

Two hundred

Twelve

Twenty

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

5,612 expressed in words is

Fifty six thousand and twelve

Five thousand, six hundred and twelve

Five billion, six million, one thousand and two

Five million, six hundred and one thousand, and two

None of the given choices

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

44,000,000,004,400 expressed in words is

Four thousand, four hundred and four

Forty four

Forty four trillion, four thousand, four hundred

Forty four thousand, four hundred and four

None of the given choices

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

70,007 expressed in words is

Seventy seven

Seventy thousand and seven

Seven hundred and seven

Seven million and seven

None of the given choices

What is the second innum in the whole number 4,562,157,963,256?

Five hundred and sixty two

One hundred and fifty seven

Nine hundred and sixty three

Two hundred and fifty six

None of the choices

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

1,001,100 expressed in words is

One hundred and eleven

One million, one thousand, one hundred

One hundred million and one

One trillion, one million

None of the above