Page 180 - NUMINO TG_5A
P. 180
11Chess Cubes Unit
4 . How many cubes from the figure on the left must be removed to 4. This exercise involves removing cubes
Have students write the subtraction sentences from one arrangement to make a new
make the figure on the right? they used to find the answers. arrangement.
a . Count the cubes used
to make figures on the 4a.
left and right. Step 1: Have students count the cubes in the
Then find the
difference. figure on the left. (There are 18 cubes)
So, 18 11 = 7. Step 2: Have students count the cubes in the
7 cubes
figure on the left. (There are 11 cubes)
b. Step 3: Have students find the difference.
3 cubes (seven cubes)
c. How many cubes were removed?
Step 4: Have students write the problem as a
3 cubes
d. subtraction sentence.
18 11 7
Divide students into pairs. Have one student
draw two unequal figures made of cubes. The
other student counts the cubes to find the
difference. Then, students switch sides and
repeat the exercise.
3 cubes
11. Chess Cubes 101
Students solve all the problems in this exercise in the same way. First, they count the number of cubes in
the formation on the left; then, count the number of cubes on the right, and subtract to find the difference.
Have students figure out the number of hidden cubes in each formation as well as the total number of cubes
in each.
5A Unit 11 163
4 . How many cubes from the figure on the left must be removed to 4. This exercise involves removing cubes
Have students write the subtraction sentences from one arrangement to make a new
make the figure on the right? they used to find the answers. arrangement.
a . Count the cubes used
to make figures on the 4a.
left and right. Step 1: Have students count the cubes in the
Then find the
difference. figure on the left. (There are 18 cubes)
So, 18 11 = 7. Step 2: Have students count the cubes in the
7 cubes
figure on the left. (There are 11 cubes)
b. Step 3: Have students find the difference.
3 cubes (seven cubes)
c. How many cubes were removed?
Step 4: Have students write the problem as a
3 cubes
d. subtraction sentence.
18 11 7
Divide students into pairs. Have one student
draw two unequal figures made of cubes. The
other student counts the cubes to find the
difference. Then, students switch sides and
repeat the exercise.
3 cubes
11. Chess Cubes 101
Students solve all the problems in this exercise in the same way. First, they count the number of cubes in
the formation on the left; then, count the number of cubes on the right, and subtract to find the difference.
Have students figure out the number of hidden cubes in each formation as well as the total number of cubes
in each.
5A Unit 11 163
