4.2 Review of Basic Decimal
Concepts
 Counting Blocks – What’s their worth?
 Flat
Long
Cube
4.2 Review of Basic Decimal
Concepts
 1 flat = ____ longs
 1 flat = ____ Cubes
1 long = ____Cubes
4.2 Review of Basic Decimal
Concepts
 When looking at the counting blocks think of how
they relate…what’s their rule?
Red Rule:
Blue Rule:
What does this further
prove?
4.2 Review of Basic Decimal
Concepts
 One of something represents the WHOLE
 The something refers to the unit
 If I only have half, I have ½
 If a pizza has 10 slices, and I eat 1 slice, I ate 1/10 of the
whole pizza.
 These are FRACTIONS!!!!
4.2 Review of Basic Decimal
Concepts
 Relating Fractions to Decimals!
 Decimal
 0.1
 0.01
Words
Fractions
one-tenth
1/10
one-hundredth
1/100
4.2 Review of Basic Decimal
Concepts
 Relating Fractions to Decimals – Fill it in!
 Decimal
 0.1
 0.01

 0.27
 0.4
Fractions
Decimals
1/10
1/100
6/10
Fractions
3/10
4/100
2 8/10
7.59
3.02
4.2 Review of Basic Decimal
Concepts
 Stuart drank three-fourths of a carton of juice
 What is the fraction? _____
 What is the whole? ___________
4.2 Review of Basic Decimal
Concepts
 Mary had 5 dollars. She spent half of it on baseball
cards.
 What is the fraction (this one might be easier as a
decimal instead): _______
 What is the whole: _________
4.2 Review of Basic Decimal
Concepts
 If the flat is ONE, then what are…
 3 longs? 3/10
4 longs and 2 cubes? _______
 5 longs?___
2 flats, 3 longs, and 4 cubes? ____
 13 cubes?
1 flat and 6 cubes? ____
 What does this practice tell us. The value is based on 1
W________
4.2 Review of Basic Decimal
Concepts
 If the flat is 1, then what are…
 2/10 _________
2 1/10 _______________
 7/10______________
3 24/100______________
 3/100__________
5 3/10 _______________
 35/100_______________
4.2 Review of Basic Decimal
Concepts
 Homework: Math Journal page 80