103
Decimal places: hundredths
Textbook: Part 3, lesson 103, pp. 101–103
GoalThe hundredths place: changing fractions with denominator 100 into decimals; reading them.
New words
one hundredth · yuzdan birhundredths place · yuzdan birlar xonasitwo-place decimal · ikki xonali kasraccuracy · aniqlik
Explanation
If we split a tenth into 10 equal parts we get a hundredth: 1/100 = 0.01. The second place after the point is the hundredths place. A fraction with denominator 100 becomes a decimal with two digits after the point: 38/100 = 0.38; 5 6/100 = 5.06. To read it, say the whole part, then the fraction part in hundredths: 4.27 is four and twenty-seven hundredths; 8.50 is eight and fifty hundredths; 9.08 is nine and eight hundredths.
Worked examples
7/100 = 0.07, because the hundredths place is the second one and the tenths place gets 0.
23 cm = 23/100 m = 0.23 m.
Class activity
“Hundred square”: draw a 10 × 10 grid on squared paper (1 whole). Children colour 3 columns (0.3) and 4 more squares (0.04) to show 0.34.
Practice
1
Write 7/100 as a decimal.
0.07
2
Write 6 9/100 as a decimal.
6.09
3
Write 7.40 as a common fraction.
7 40/100
4
Read 15.32 in words.
fifteen and thirty-two hundredths
5
Write 23 cm in metres as a decimal.
0.23