Open Middle®
Directions: Use the operation symbols (+, -, x, and ÷) to make the equation true. Operations may be used more than once.
Hint
What is a value for the left side of the equation? What is a value for the right side of the equation?
Answer
There are many possibilities, here is one
2 x (3 x 7 + 9) = (1 x 5) x (8 +4)
2 x (3 x 7 + 9) = (1 x 5) x (8 +4)
Source: Joshua Nelson
My class got 2 x (3 + 7 + 9) = (1 + 5) + (8 x 4)
2+(3×7=9)=(1-5)/(8×4)
2x(3/7-9)=(1+5)x(8/4)
2-(3x7x9)=(1-5)-(8/4)
2/(3-7/9)=(1×5)98-4)
2x(3+7+9)=(1-5)(8×4)
2×(3×7+9)=(1×5)×(8+4)
you helped me alot
We got
2X(3×7-9) = (1+5×8-4)
Both sides need to be equal. In most of your examples, you have either a negative solution on only one side, or you have a fractional answer on only one side.
2+(3×7=9)=(1-5)/(8×4)
2 + (21-9) = -4 ÷ 32 (I assumed you meant -9, not =9
2 +12 = -⅛ (or -0.125)
14 ≠ -⅛
2x(3/7-9)=(1+5)x(8/4)
2 x (3 ÷ 7 – 9) = (1 + 5) x (8 ÷ 4)
2 x (3/7 – 9) = 6 x 2
2 x -8 4/7 = 12
-17 1/7 ≠ 12
2-(3x7x9)=(1-5)-(8/4)
2 – (21 x 9) = -4 – 2
2 – 189 = -6
-187 ≠ -6
2/(3-7/9)=(1×5)98-4)
2 ÷ (3 – 7/9) = 5 x 4 (I assumed you meant x, not 9)
2 ÷ 2 2/9 = 20
9/10 ≠ 20
2x(3+7+9)=(1-5)(8×4)
2 x 19 = -4 x 32
38 ≠ -128
You were almost there. On your last equation, can you rework the second expression to equal the value of the first expression?
2 x (3 + 7 + 9)=(1 + 5) + (8 x 4)
I got 2 times (3 times 7 + 9)=( 1 times 5)times ( 8+4)
2- (3X7-9)=(1X5)X(8+4)
2x (3+7+9)=(1-5)(8×4)
2x (3+7+9)=(1-5)(8×4)
2 x (3 x 7 + 9) = (1 x 5) x (8 +4)
2x(3×7+9)=(1×5)x(8+4)
2 x (3 x 7 + 9) = (1 x 5) x (8 + 4)
2 X (3×7+9)=(1×5)x(8+4)
I kinda do but don’t you put what you think goes were and you pute them there
2 x (3 x 7 + 9) = (1 x 5) x (8 +4) Is the one that I got.
i don understand the equation
2-(3+7-9)=(1×5)-(8-4)
I got 2×(3×7+9)=(1-5)×(8+1)
2 x (3 x 7 + 9) = (1 x 5) x (8 +4)
I got 2 +(3-7+9)=(1×5)+(8/4) Answer 7.
2x(3×7+9)=(1×5)x(8+4)
2x(3×7+9)=(1×5)x(8+$
2x(3×7+9)=(1×5)x(8=4
2x(3=7=9)=(1×5)x(8=4)
2x(3×7+9) = (1×5)x(8+4)
2 x (3 x 7 + 9) = (1 x 5) x (8 +4)
2x(3×7+9)=(1×5)x(8+4)
Wow Trevor this was actually helpful.
2x(3-7+9)=(1+5)-(8×4)
OMG. Thank you so much. All the other ones are wrong after I tried doing it. You are right. Thank you Thank you Thank you!
2 + ( 3 + 7 – 9 ) = ( 1 x 5 ) – ( 8 / 4 )
2 x [3+7+9]=[1+5+4 x 8]
2 x (3 x 7 + 9) = (1 x 5) x (8 +4)
2x(3+7+9)=(1+5)+(8×4)
2x(3+7+9)=(1+5)+8×4}
We got
2x(3×7-9) = (1+5)x(8-4)
2×(3x7x9)=(1×5)x(8×4)
2x(3×7+9)=(1×5)x(8+4)
I got 2-(3+7-9)=(1/5)-(8-4)
14 solutions:
2 – (3 + 7 – 9) = (1 * 5) – (8 – 4) = 1
2 – (3 * 7 / 9) = (1 – 5) / (8 + 4) = -0.33
2 * (3 + 7 – 9) = (1 + 5) – (8 – 4) = 2
2 * (3 * 7 – 9) = (1 + 5) * (8 – 4) = 24
2 * (3 – 7 – 9) = (1 + 5) – (8 * 4) = -26
2 * (3 + 7 + 9) = (1 + 5) + (8 * 4) = 38
2 * (3 * 7 + 9) = (1 * 5) * (8 + 4) = 60
2 * (3 – 7 + 9) = (1 * 5) * (8 / 4) = 10
2 * (3 – 7 + 9) = (1 + 5) + (8 – 4) = 10
2 / (3 + 7 – 9) = (1 + 5) – (8 – 4) = 2
2 / (3 – 7 + 9) = (1 / 5) * (8 / 4) = 0,4
2 + (3 + 7 – 9) = (1 * 5) – (8 / 4) = 3
2 + (3 + 7 – 9) = (1 + 5) / (8 / 4) = 3
2 + (3 – 7 + 9) = (1 * 5) + (8 / 4) = 7
2-(3+7-9)=(1×5)-(8-4)
=1