Math

Question 1

How do you now how many number spaces there should be behind a decimal, when multiplying decimals.

Answer 1

1set up like a normal muliplication problem
2Ignore the decimal points while you multiply
3then count the decimal places in the numbers you multiplied.
4.Starting from the right, count however many places to the left and insert the
decimal point

check page 505 for examples

Question 2

how do you divide decimals? if the divsor is a whole number

Answer 2

1. Set up the problem. Since the divisor (the number you are dividing by)
   is a whole number, place the decimal point in the answer directly above
   the decimal point in the dividend (the number you are dividing).
2. now divide

check page 505

Question 3

how do you divide decimals, if the divsor is a decimal

Answer 3

make the divisor a whole number by shifting the decimal point to the right. Then, shift the decimal point in the dividend the same number of places to the right. Finally, perform regular long division

check pager 507

Question 4

to mulitply fractions do the fractions need to be like fractions?and how do you solve this type of probelm

Answer 4

no, just mulitply like normal straight across. if there if a mixed number make sure to turn it into an imporoper fraction, simplfy if needed.

Question 5

how do you divide fractions?

Answer 5

just like mulitpling them but you inverse the N and the D. so the D is on top and the N is on the bottom and mulitiply. simplify fractions if needed

page 528

Question 6

how do you change a fraction into a decimal?

Answer 6

You divide the N by the D.
So 3/8ths would be 3 Divided by 8, which is 0.375

533pg

Question 7

how do you change a decimal to a fraction?

Answer 7

To change a decimal to a fraction, write the number without the
decimal point over the place value of the last decimal digit. Reduce.
EXAMPLE”: 0.35 as a fraction
35/100 (put 35 over 100 as a fraction and reduce as much as possible) the answer will be 7/20s

pg 534

Question 8

what is 1/8 as a decimal

Answer 8

0.125

Question 9

wjat os 0.2 as a fraction

Answer 9

1/5

Question 10

what is 3/10ths as a decimal

Answer 10

0.3

Question 11

what is 0.333 as a fraction?

Answer 11

3/10

Question 12

what is 0.375 as a fraction

Answer 12

3/8s

Question 13

what is 2/5ths as a decimal

Answer 13

0.4

Question 14

what is 0.6 as a fraction

Answer 14

3/5

Question 15

what is 0.625 as a fraction

Answer 15

5/8

Question 16

A ____ is an equation that shows that two ratios are equal. The cross
products in a true proportion are equal. In other words, when you multiply
diagonally across the equals sign, the products are equal.

Answer 16

proporition