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

Describe in words the last innum of the whole number 86,967,287.

Eighty six million

Nine hundred and sixty seven thousand

Two hundred and eighty seven

Nine hundred and sixty seven

None of the choices

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

20 expressed in words is

Two

Two thousand

Two hundred

Twelve

Twenty

1,237 expressed in words is

Twelve thousand and thirty seven

One hundred and twenty thousand, and thirty seven

Twelve thousand, three hundred and seven

One million, two hundred thousand and thirty seven

One thousand, two hundred and thirty seven

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

1,001,100 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

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

1,000,001 expressed in words is

One million and one

One billion and one

One trillion and one

One thousand and one

One hundred and one

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

Which is the whole number 75,192?

Seventy five million, one hundred and ninety two

Seventy five thousand

Seventy five thousand, one hundred and ninety two

Seventy five billion, one hundred and ninety two

None of the choices