Page 83 - NUMINO TG_6A
P. 83
077_G6U5_G6U8_TG 2014.4.17 6:8 PM ˘ ` 066
Activity 1 Converting Fractions to Decimals
jOb ective Write fractions as decimals.
1. Textbook Instructions Activity 1 Converting Fractions to Decimals
Have students write mixed numbers and A 10 in the denominator indicates that the decimal form has digits to the tenths place, and a
100 in the denominator indicates that the decimal form has digits to the hundredths place.
Learn how to write fractions as decimals.
fractions as decimals. Have them multiply a 1 1 1
2 4 8
number to the numerator and the denominator Write , , and as decimals. Make fractions that have
denominators of 10, 100,
to make fractions with a denominators of 10, 1 1 5 5 = 0.5
2 2 5 10 and 1,000.
100, or 1,000. Then write them as decimals. = =
Then write them as
Refer to . 1 1 25 25
4 4 25 100 decimals.
= = = 0.25
1 = 1 125 = 125 = 0.125
8 8 125 1,000
1. Have students write the fractions as 1 . Write the correct numbers in the blanks.
decimals. They must multiply the same
number to the numerator and the a. 1 1 2 2 b. 3 3 5`5255 55 75
denominator. They must first find a number to 5 = = 10 4 =
multiply to make a denominator 10, 100, or = 0.2 == 0.75
1,000 and then multiply the same number to 5 5`255 4
the numerator. After that, they can change 5`525555 100
the fraction into a decimal.
2. Have students first change the fraction so c. 3 3 5`555 15 d. 9 9 5`855 72
that it has a denominator of 10, 100, or 20 20 125 125
1,000 before writing it as a decimal. = == 0.15 = == 0.072
5`555 100 5`855 1,000
2c. Guide them not to write 0.022 as 0.22. 2 . Write each fraction as a decimal.
0.022 22 , 0.22 22 , so the two a. 4 = 0.8 b. 1 = 0.04 c. 11 = 0.022
1,000 100 5 25 500
decimals are not the same.
Have students understand that they need to
change the fraction with a denominator of
1,000 into a decimal in the 1,000 0.
thousandths place. 40
2. Build Understanding
How to Write Fractions as Decimals 50=1,000,
Have students change mixed numbers into decimals.
A. Numbers you can multiply to make a denominator of 10.
2, 5 (2 5 10)
B. Numbers you can multiply to make a denominator of 100.
2, 4, 5, 10, 20, 25, 50 ( 2 50 100, 4 25 100, 5 20 100, 10 10 100)
C. Numbers you can multiply to make a denominator of 1,000.
2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 125, 200, 250, 500
(2 500 1,000, 4 250 1,000, 5 200 1,000, 8 125 1,000, 10 100 1,000, 20
25 40 1,000)
066 NUMINO Teacher s Guide
Activity 1 Converting Fractions to Decimals
jOb ective Write fractions as decimals.
1. Textbook Instructions Activity 1 Converting Fractions to Decimals
Have students write mixed numbers and A 10 in the denominator indicates that the decimal form has digits to the tenths place, and a
100 in the denominator indicates that the decimal form has digits to the hundredths place.
Learn how to write fractions as decimals.
fractions as decimals. Have them multiply a 1 1 1
2 4 8
number to the numerator and the denominator Write , , and as decimals. Make fractions that have
denominators of 10, 100,
to make fractions with a denominators of 10, 1 1 5 5 = 0.5
2 2 5 10 and 1,000.
100, or 1,000. Then write them as decimals. = =
Then write them as
Refer to . 1 1 25 25
4 4 25 100 decimals.
= = = 0.25
1 = 1 125 = 125 = 0.125
8 8 125 1,000
1. Have students write the fractions as 1 . Write the correct numbers in the blanks.
decimals. They must multiply the same
number to the numerator and the a. 1 1 2 2 b. 3 3 5`5255 55 75
denominator. They must first find a number to 5 = = 10 4 =
multiply to make a denominator 10, 100, or = 0.2 == 0.75
1,000 and then multiply the same number to 5 5`255 4
the numerator. After that, they can change 5`525555 100
the fraction into a decimal.
2. Have students first change the fraction so c. 3 3 5`555 15 d. 9 9 5`855 72
that it has a denominator of 10, 100, or 20 20 125 125
1,000 before writing it as a decimal. = == 0.15 = == 0.072
5`555 100 5`855 1,000
2c. Guide them not to write 0.022 as 0.22. 2 . Write each fraction as a decimal.
0.022 22 , 0.22 22 , so the two a. 4 = 0.8 b. 1 = 0.04 c. 11 = 0.022
1,000 100 5 25 500
decimals are not the same.
Have students understand that they need to
change the fraction with a denominator of
1,000 into a decimal in the 1,000 0.
thousandths place. 40
2. Build Understanding
How to Write Fractions as Decimals 50=1,000,
Have students change mixed numbers into decimals.
A. Numbers you can multiply to make a denominator of 10.
2, 5 (2 5 10)
B. Numbers you can multiply to make a denominator of 100.
2, 4, 5, 10, 20, 25, 50 ( 2 50 100, 4 25 100, 5 20 100, 10 10 100)
C. Numbers you can multiply to make a denominator of 1,000.
2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 125, 200, 250, 500
(2 500 1,000, 4 250 1,000, 5 200 1,000, 8 125 1,000, 10 100 1,000, 20
25 40 1,000)
066 NUMINO Teacher s Guide
