8.9 Exploring Fractional Parts

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8.9 Exploring Fractional Parts and Addition
Facts Objectives To guide exploration of the
relationship between multiples and fractions to
reinforce naming fractional parts of regions
and to provide practice with addition
facts. Math Journal 2, page 174 Pattern-Block
Template EXPLORATION A Teaching Masters, Math
Masters, page 241 and 242 Pattern-Block
Template pattern blocks EXPLORATION B Teaching
Aid Masters, Math Masters pages 315 and
316 geoboards rubber bands, colored if
possible EXPLORATION C, per partnership Teaching
Master, Math Masters, page 244 Fact
Triangles Math Master, Home Link page
244 slate Teaching Master, Math Masters page
151 My Reference Book, page 150 and
151 scissors drawing paper
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Lesson 8.9
Mental Math and Reflexes Begin at 0. Count by
10s to 60. Stop. Continue counting by 5s to 75.
Stop. Continue counting by 1s to 78. Begin at
0. Count by 25s to 50. Stop. Continue counting
by 10s to 100. Stop. Continue counting by 5s to
115. Stop. Continue counting by 1s to
118. Begin at 25. Count by 25s to 100. Stop.
Continue counting by 10s to 150. Stop. Continue
counting by 5s to 195. Stop. Continue counting
by 1s to 199. Home Link from yesterday, 8.8
Math Message Take a piece of paper. Use your
Pattern-Block Template to draw each pattern-block
shape. Write the name of each shape.
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Exploration A Finding Relationships Involving Pattern Blocks Directions 1. Cover the larger shape with one kind of pattern block. 2. Use the Pattern-Block Template to draw the arrangement of the pattern blocks on the larger shape. 3. Fill in the numbers that express the relationship between the pattern block and the larger shape. Work cooperatively, but make your own record. Math Masters, page 241 Exploration B Naming Fractional Parts of Regions Math Masters, pages 315-316 Each partnership has one geoboard and several rubber bands. One partner makes a symmetrical shape with a rubber band. The other partner uses more rubber bands to divide the shape into 2, 3, or 4 equal parts. Record four of the shapes that can be divided into equal parts and show how they were divided. Exploration C Sorting Fact-Triangles 1. Remember what near doubles are, such as 3 4 and 8 9. 2. Partners short one set of Fact Triangles into doubles, near doubles, 10 sums, and other facts. Record the Fact Triangles on page 243. Practice facts triangles.
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Math Masters, page 241 Exploration A
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Math Masters, page 242 More Pattern Block
Puzzles Exploration A
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Math Masters, pages 315 and 316 Exploration
B Fractional Parts of Regions
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Math Masters, page 243 Fact-Triangle Sorting
Record
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Playing the 3, 2, 1 Game My Reference Book, pages
150 and 151
Partners play the 3, 2, 1 Game.
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Math Boxes 8.9 Math Journal 2, page 174
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Home Link 8.9 Page 244 Facts Practice
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Great online symmetry lesson!
Cutting Symmetrical Shapes Use blank
paper. Cut out a circle. Cut out a
square. Cut out a triangle. Fold each shape
you cut out in half and test for
symmetry. Trim shapes if needed to make them
symmetrical. Try cutting folded paper to make
the shapes, too!
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Two-Fisted Penny Addition for 17 and 18 Math
Masters, page 151
Start with 17 pennies. Grab a handful of the
pennies with one hand. Pick up the rest of the
pennies with the other hand. Record your numbers
on page 151.
Start with 18 pennies. Grab a handful of the
pennies with one hand. Pick up the rest of the
pennies with the other hand. Record your numbers
on page 151.
See the next slides for interactive practice.
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TWO-FISTED PENNY ADDITION FOR 17 Start with 17
pennies. Grab a handful of the pennies with one
hand. Pick up the rest of the pennies with the
other hand. Record your numbers on page 151.
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TWO-FISTED PENNY ADDITION FOR 18 Start with 18
pennies. Grab a handful of the pennies with one
hand. Pick up the rest of the pennies with the
other hand. Record your numbers on page 151.