Texas Instruments TI15TK Teacher Guide - Page 86
Comparing fractions and decimals, Numerator Key, Denominator Key
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Comparing fractions and decimals Linda swims 20 laps in 5.72 minutes. Juan swims 20 laps in 5¾ minutes. Who swims faster? Compare the time as decimals and fractions. To compare the times as decimals: Press Display 5 3 4 ® 5 í3íí = 4 5 íí3í 4 Ÿ Ÿ 5Ù75 Nn D &d 5 í7íí5ííí 100 Numerator Key Denominator Key ¥ Continue to compare as fractions: 5 r 72 ® 5Ù72Ú 5Ù72 Ÿ N D &nd 5 7íí2ííí 100 © 2000 TEXAS INSTRUMENTS INCORPORATED TI-15: A Guide for Teachers 79
© 2000 T
EXAS
I
NSTRUMENTS
I
NCORPORATED
TI-15: A Guide for Teachers
79
Comparing fractions and decimals
Linda swims 20 laps in 5.72
minutes. Juan swims 20 laps in 5¾
minutes. Who swims faster?
Compare the time as decimals and
fractions.
To compare the times as decimals:
Numerator Key
²
Denominator Key
¥
Press
Display
5
±
3
²
4
®
3
3
4
4
Ÿ
5Ù75
Ÿ
N
D
&
n
d
75
100
Continue to compare as fractions:
5
r
72
®
5Ù72Ú
5Ù72
Ÿ
N
D
&
n
d
72
100
ííí
íííííí
ííííí
5
5
5
5
=
ííí