Page 196 - NUMINO TG_1A
P. 196
12How Many Groups of 10? Unit
Material Stopwatch
Round 2
For round 2, have students count the items
in groups of ten. Then write 10, 20, 30, 40,
etc. next to the grouped items and count
them.
START Refer to .
70 There are forty items in the second box.
Students might make the mistake of
40 grouping the items that are vertically placed,
and then count one column as ten items to
30 write fifty as the total.
This error occurs because students do not
FINISH count the items before putting the items into
one group. So have students check whether
90 there are ten items in one group.
12. How Many Groups of 10? 111 10 20 30 40 50
60 10
20
30
40
50 40
() ()
20 If none of the students that participated
reach the finish point, have the one who is
closest to the finish win the game.
Counting in Groups of Ten 10 20 30 10 20 20 10
10 30 40 10 20 30 40
1020 3040506070 20 50 60 60 80
30 20 50 70 90
70 40 40 60
90
30
1A Unit 12 179
Material Stopwatch
Round 2
For round 2, have students count the items
in groups of ten. Then write 10, 20, 30, 40,
etc. next to the grouped items and count
them.
START Refer to .
70 There are forty items in the second box.
Students might make the mistake of
40 grouping the items that are vertically placed,
and then count one column as ten items to
30 write fifty as the total.
This error occurs because students do not
FINISH count the items before putting the items into
one group. So have students check whether
90 there are ten items in one group.
12. How Many Groups of 10? 111 10 20 30 40 50
60 10
20
30
40
50 40
() ()
20 If none of the students that participated
reach the finish point, have the one who is
closest to the finish win the game.
Counting in Groups of Ten 10 20 30 10 20 20 10
10 30 40 10 20 30 40
1020 3040506070 20 50 60 60 80
30 20 50 70 90
70 40 40 60
90
30
1A Unit 12 179
