Page 31 - NUMINO Challenge_B1

Type 3-2 Inserting Parentheses

Inserting parentheses in an expression at different positions can result
different answers. Look at the equations in the box below.

{(50 10) 7} 2 94
50 (10 7) 2 16
{50 (10 7)} 2 66

Insert parentheses in the following expression to get different answers.
Then find the difference between the greatest and the smallest
answers.

100 70 20 5 2

1 To get the greatest answer, the expression before the multiplication sign
must produce the greatest value. Insert parentheses at the appropriate
places in the following expression to get the greatest answer.
100 70 20 5

2 Use the answer from 1 to find the greatest answer for the expression.
100 70 20 5 2

3 To get the smallest answer, the subtracted number or the divisor should be
as great as possible. Insert parentheses at the appropriate place to get the
greatest divisor.
100 70 20 5 2

4 Insert ( ) or { } to make the dividend of the expression in 3 as
small as possible. Then find the answer.
100 70 20 5 2

5 Find the difference between the greatest and the smallest answers.

28 NUMINO Challenge B1