Page 194 - NUMINO TG_1A

Math VoCabulary ones: two or more ones 12How Many Groups of 10? Unit

tens: groups of ten

2 Count the items. Write the number in different ways. 2. Have students count the items in groups
of ten.
Count by tens
Have students count how many are in one
a group to check if there are ten in each
group.
b 2b. In this picture, the apples are not grouped
40 forty into tens. Have students circle
ten apples as one group and then make
c four groups.
50 fifty
3. Check Point
d
60 sixty Having understood the concept of tens, have
students understand that three groups of ten
e make thirty. This will help students understand
70 seventy multiplication better, which they will learn in
the later units.
f
80 eighty

g
90 ninety

12. How Many Groups of 10? 109

The Word Form 6 60
Some students might find it difficult to write the tens in word Six Sixty
form. In this case, have them write 1-digit numbers in word form 70
to get more familiar with using word forms. Have students add 7 Seventy
“-ty” to the end of the word (1-digit number) to make the word Seven 80
form for 60, 70, 80, and 90. The meaning of “-ty” is “tens more.” Eighty
8 90
Eight Ninety

9 1A Unit 12 177
Nine