Page 72 - NUMINO TG_4A

04Numbers in Disguise Unit

2 . Each alphabet letter represents a certain number. 2. Have the students find what each letter
represents in these puzzles.
Find the numbers to complete each puzzle.
a. 2a.
Find C
+ A 3-digit number is added to a 2-digit
number to make a 4-digit number. C is 1
951 + 58 = 1009
= 9, = 5, = 1, = 8, = 0 Find A
A must be 9 so that C can be 1.
b.
Find E
_ If A is 9 and C is 1, E must be 0.

Find B
Make a sum of 10 by adding the same
digit, 5 5 10. B is 5.

Find D
The number added to 1 to make 9 is 8.
951 58 1,009.

111 99 = 12
= 1, = 9, = 2

4. Numbers in Disguise 35

1b. Problem solving
Step 1. Find A
Since A in the hundreds place is not brought down to the difference, A is 1.
Step 2. Find B
A B 1. B can either be 0 or 9. If B is 0, C will also be 1.
Since each letter represents a different number, B is 9.
Step 3. Find C
11 9 2. 111 99 12.

4A Unit 04 055