Page 202 - NUMINO TG_3A

Challenge Christmas Presents 12Beat the Calculator! Unit

jOb ective Calculate (2-digit number) (1-digit number) and find the missing numbers.

Challenge Christmas Presents 1. Textbook Instructions

1 . The Lazy Mathematician went to a mall to buy Christmas presents. 1. Have students first write the sentence
using boxes and letters to represent the
He bought 6 scarfs for each child and 1 for himself. missing numbers. Then have them calculate
the numbers and find the total price.
RECEIPT On his way home, the Lazy
Mathematician checked his receipt to You can write a sentence as shown below
ITEM SCARF see how much he spent. A part of the to find the total price.
receipt was torn off.
How much did the Lazy 3A
Mathematician pay for each scarf? 7
How much did he spend in all? 8

37 The first number you must find is A in
77 7 A. Since the product in the ones place is
778 8, the only possible multiplication you can
use is 7 4 28.
Therefore, A 4.
The answer is 34 7 238.

PRICE 34
QUANTITY 7
2 38
TOTAL
PRICE

12. Beat the Calculator! 117

2. Build Understanding

Problem: Find the numbers for A, B, and C. Solution: Since the product in the ones place is 8, A 6 in
6 3 18.
1 A CB A 6, so 16 3 48 and B 4.
36 B 4, so 6 C 2 8 and 6 C 6.
Therefore, 6 1 6 and C 1.
B8 84

Answer: A 6, B 4, C 1

3A Unit 12 185