112 ◆ Modeling Thinking
Farmer Betsy-Lou planted a garden. It had an area of 12 feet. What
are the different shapes that this garden could have been?elementary grades, use them for multiplication, division and comparison
problems as well as for fraction problems.
John had 4 bears. Mary had 2 times as many as he did. How many
how did she have? How many did they have altogether?There were 8 bears. Some more came and now there are 16. How
many came?There were 15 bears equally divided into 5 boats. How many bears
were in each boat?There were 12 bears. One-third of them were blue. One-half of them
were orange. The rest were yellow. How many of each bear were
there?There were 15 green bears. This was 5 times as many as the orange
bears. How many orange bears were there?Unifix Cubes
Unifix® cubes should be used for the same types of problems as the bear
problems. Also use Unifix® cubes and snap cubes for perimeter and area
problems (see Figures 7.3, 7.4 and 7.5). Use 1-inch tile paper to act out
these problems as well. This paper allows students to trace their work on
the grid paper.