Page 166 - NUMINO TG_3A

1099 0 ?? Unit

CMath Vo abulary regroup: to rearrange numbers to make new groupings

2 . Learn how to multiply 12 by 4. 2. Explain how to calculate (2-digit number) x
(1-digit number) vertically without regrouping.
Multiply the ones. 12 12
4 2 ones = 8 ones 4 4 Have students calculate vertical
8 8 Multiply the ones. multiplications and write the ones that are
multiplied in the ones place, and the tens
4 0 Multiply the tens. that are multiplied in the tens place.
4 8 Add the products.
12 12 12
Multiply the tens. 12 444
4 1 ten = 4 tens 4
8 48
48
Write the Write the

ones in the tens in the

ones place. tens place.

Multiply. When calculating multiplication in horizontal

a. 22 sentences, make sure you write the ones
3
b. 14 c. 32 d. 23 and tens in the appropriate places.
66 2 2 2
Example: 2i.
28 64 46

e. 32 f. 43 g. 12 h. 21 ones
3 2 3 2
31 2 62
96 86 36 42
tens

i. 31 2 6 2 j. 42 2 8 4 k. 11 6 6 6

10. 99 0 = ?? 93

Problem: Find the whole numbers that can go in the . Write the process and the answer.

22 80

Solution: Write the numbers in the in order from 1. are 1, 2, 3.
22 1 22, 22 2 44, 22 3 66, 22 4 88
Therefore, the whole numbers that can go in the

Answer: 1, 2, 3

3A Unit 10 148