Open Middle®
Directions: Using the digits 1 to 9, at most one time each, place a digit in each box to make a product that equals 800,000,000.
Hint
How do the digits you choose for the exponents affect the product? How do the digits you choose to multiply by 10 affects the product?
Answer
Here are some potential answers:
4*10^3 * 2*10^5
8*10^6 * 1*10^2
4*10^3 * 2*10^5
8*10^6 * 1*10^2
Source: Robert Kaplinsky
I got (4×10^3)(2×^5)
(4×10^3)(2×^5) ese fue el digito que me salio
I also got (4×10^3)(2x^5)
I got (4×10^3) (2×10^5)
(4×10^3) (2×10^5)
(8* 10^8)(1*10^0) and (4×10^3)(2*10^5)
(4*10^3)(2*10^5)
(4*10^8)(2*10^5)
(4×10^3) (2×10^5)
(8*10^7) (1*10^4)
I got (4*10^3)(2*10^5)
I got 4*10^3 * 2*10^5
I got ( 1*10^8)(8*10^0)