Page 169 - NUMINO TG_3A

Activity 3 Regrouping in Ones Place

jOb ective Learn how to multiply a 2-digit number by a 1-digit number with a regrouping in the ones place.

1. Textbook Instructions Activity 3 Regrouping in Ones Place

Explain how to calculate (2-digit number) x (1- 1 . Fill in the blanks to solve the problem. 13 4 = 52
digit number) with a regrouping in the ones
place. a. 1

1. Show students how the ones are 13
regrouped to make the tens before solving 13
the addition and multiplication problems. 13
13
Have students understand that 10 base-one
blocks represent 1 base-ten blocks before 52
they attempt to solve the problems.
b.
15 3 = 45

1

15
15
15

45

c. 16 4 = 64

96 2

16
16
16
16

64

2. Build Understanding

Problem: Students are getting ready to have a race in the field. Students line up in groups of 6.
There are 38 lines altogether. How many students are there in total?

Solution: There are 38 lines and 6 students in each line. Therefore, 38 6 228.
Answer: There is a total of 228 students.

151 NUMINO Teacher s Guide