Chapter 1 Basic Math Review Flashcards
If you go right -> of the decimal point what place values do you have?
Decimal point -> Tenths hundredths Thousandths Ten thousandths Hundred thousandths Millionths
If you go left <- of the decimal point what place values do you have?
Decimal point <- Ones Tens Hundreds Comma Thousands Ten thousands Hundred thousands Comma Millions
951.3 written is?
Nine hundred fifty-one and three tenths
1994.251 written is?
One thousand nine hundred ninety-four and two hundred fifty-one thousandths
334.333 written is?
Three hundred thirty-four and three hundred thirty-three thousandths
16.0055 written is?
Sixteen and fifty-five ten thousandths
30,002.3 written is?
Thirty thousand two and three tenths
70,902,667.08 written is?
Seventy million nine hundred two thousand six hundred sixty-seven and eight hundredths
6,723,654,786
Six million seven hundred twenty-three thousand six hundred fifty-four and seven hundred eighty-six thousandths
How do you write five and five tenths in decimal form?
5.5
How do you write ten and one thousandth in decimal form?
10.001
How do you write four hundred thirty-five and four hundred three thousandths in decimal form?
435.403
How do you write three thousand two hundred twenty-two and thirty-five hundredths in decimal form?
3,222.35
How do you write five hundred fifty and sixty two millionths in decimal form?
550.000062
How do you add and subtract decimals?
Line up the decimals and then add or subtract like normal
How do you multiply decimals?
Multiply them like normal then count the decimal spaces and put them in the answer.
Ex: 100x.06
.06 .06
.-> 2 places. X 100
0600
. 2 places
X 0.5 ->. 1 place = 3places
060 <-. 3 places
You get 0.060 or 0.60How do you divide decimals?
Divide the first number by the second
Count the decimals and add them the the number inside the divide or move the decimal up.
Ex: 0.8 / 2
0.4 So you just move the decimal
2/0.8 straight up
0⬇️ You get 0.4
08
Ex: 15 / 0.3
.-> 1 place
050.
0.3/15.0
.-> 1 place 0⬇️
15
15
00
You get 50
How do you convert fractions to decimals?
Divide first number by second number
If you go left <- of the decimal point what place values do you have?
Decimal point <- Ones Tens Hundreds Comma Thousands Ten thousands Hundred thousands Comma Millions
If you go right -> of the decimal point what place values do you have?
Decimal point -> Tenths hundredths Thousandths Ten thousandths Hundred thousandths Millionths
951.3 written is?
Nine hundred fifty-one and three tenths
1994.251 written is?
One thousand nine hundred ninety-four and two hundred fifty-one thousandths
334.333 written is?
Three hundred thirty-four and three hundred thirty-three thousandths
16.0055 written is?
Sixteen and fifty-five ten thousandths
