Page 19 - NUMINO Challenge_D1

2 Worm-Eaten Calculations

Basic Concepts Worm-Eaten Calculations 1

Worm-Eaten Calculations look like they have been 0
eaten by worms. 1
In a Worm-Eaten Calculation, no numbers ever start
with a zero, and each blank represents only one digit. 8
Therefore, it is easy to see how many digits a number
has. 5
0
Example Fill in the to complete the
(3-digit number) (2-digit number) multiplication
sentence.

Class Notes

1 11 1
8 88 8

5 55 5
0 00 0

In , since the number in the ones place of the product 8 is , can be either

or .

In , since the number in the ones place of the product is , the two factors

cannot be 0. Therefore, .

In , since the product of 1 8 is a 3-digit number, .
should be
In , since the product of 1 is a 4-digit number, .

Fill in the rest of the blanks.

16 NUMINO Challenge D1