Open Middle®
Directions: Using the digits 1 to 9, at most one time each, place a digit in each box to make the equation true.
Hint
How does choosing the divisor and dividend affect the quotient?
What digits would be bad choices for the divisor?
What digits would be bad choices for the dividend?
What digits would be bad choices for the divisor?
What digits would be bad choices for the dividend?
Answer
There are many possible answers including:
9 ÷ 2 = 4.5
6 ÷ 4 = 1.5
8 ÷ 5 = 1.6
9 ÷ 2 = 4.5
6 ÷ 4 = 1.5
8 ÷ 5 = 1.6
Source: Owen Kaplinsky
5/3 = 1.7 (1.6 repeating)
9/5 = 1.8
In addition to the three solutions given by Owen and the second solution given by Mrs. Elliott there are five others: 1,2 = 6 ÷ 5, 1,4 = 7 ÷ 5, 1,5 = 3 ÷ 2, 1,5 = 9 ÷ 6 and 3,5 = 7 ÷ 2
3/2=1.5
9/2=4.5
1.5
3.5
7 divided by 2
7 divided by 2 =3.5
9 divided by 5 = 1.8
25 divided by 8=3.125