Page 241 - NUMINO TG_2A
P. 241
Activity 3 Skip-Counting by Grouping
jOb ective Understand the meaning of 2 groups of 10.
1. Textbook Instructions Activity 3 Skip-Counting by Grouping
After making equal groups, express them as 1 Count the items in each box by putting them into equal
how many groups of what, and then explain
how to write this in an addition sentence. groups. The number in the circle indicates the number of
Example: 2 groups of 10 10 10 20 items in each group.
1. Extend further than just the problems in a 10
the textbook, and have students express
equal groups in various sentences. 2 groups of 10
10 + 10 = 20
1a. The question can be guided in the
following way. b5
Let’s group the marbles in groups of 10.
How many groups are there? 2. 6 groups of 5
How many marbles are there per group? 5+5+5+5+5+5=30
10 marbles.
How many groups of what is it? 2 groups of c7
10.
Let’s express 2 groups of 10 using 3 groups of 7
different sentences. 7+7+7=21
A1: There are 10 marbles in each group.
A2: There are 2 equal groups.
A3: There are 2 tens.
A4: 10 10 20.
A5: There are 20 marbles in total.
138
2. Build Understanding
Some students confuse 2 groups of 10 with 10 groups of 2. Guide these students to understand better with
diagrams.
2 groups of 10 10 groups of 2
224 NUMINO Teacher s Guide
jOb ective Understand the meaning of 2 groups of 10.
1. Textbook Instructions Activity 3 Skip-Counting by Grouping
After making equal groups, express them as 1 Count the items in each box by putting them into equal
how many groups of what, and then explain
how to write this in an addition sentence. groups. The number in the circle indicates the number of
Example: 2 groups of 10 10 10 20 items in each group.
1. Extend further than just the problems in a 10
the textbook, and have students express
equal groups in various sentences. 2 groups of 10
10 + 10 = 20
1a. The question can be guided in the
following way. b5
Let’s group the marbles in groups of 10.
How many groups are there? 2. 6 groups of 5
How many marbles are there per group? 5+5+5+5+5+5=30
10 marbles.
How many groups of what is it? 2 groups of c7
10.
Let’s express 2 groups of 10 using 3 groups of 7
different sentences. 7+7+7=21
A1: There are 10 marbles in each group.
A2: There are 2 equal groups.
A3: There are 2 tens.
A4: 10 10 20.
A5: There are 20 marbles in total.
138
2. Build Understanding
Some students confuse 2 groups of 10 with 10 groups of 2. Guide these students to understand better with
diagrams.
2 groups of 10 10 groups of 2
224 NUMINO Teacher s Guide
