Number Of Bowling - Sharp EL-531RH Teachers Manual

Number Bowling
• • • • • • • • • • • • • • • • • • • • • Objective • • • • • • • • • • • • • • • • • • • • •
Read whole numbers and understand that the position of a digit signifies its value.
Understand and use the concept of place value in whole numbers.
• • • • • • • • • • • • • • • Explanation of the activity • • • • • • • • • • • • • •
Think of a 3-digit number and enter it into your calculator.
Pretend each digit is a "bowling pin."
Knock down each pin one at a time, so that your calculator display shows 0.
A: Using subtraction
B: Using addition
• • • • • • • • • • • • • • • • • Using the calculator • • • • • • • • • • • • • • • • •
Calculator functions used: Subtraction, addition, last answer memory
Press the following buttons and then start operation.
(1) Enter a 3-digit number.
638
(2) Knock down one digit, or "pin"; i.e. change the last
digit to a 0.
8
(3) Knock down the next pin; i.e. change the tens column
digit to 0.
30
(4) Knock down the pin of the hundreds column.
600
A: Using subtraction
4
Junior high school
DEG
638=
DEG
ANS-8=
DEG
ANS-30=
DEG
ANS-600=