Open Middle®
Directions: Using the digits 0 to 9 at most one time each, place a digit in each box to create a true equation.
Hint
What two-digit numbers would be too low/high that when multiplied together would not make a three-digit product?
Answer
There are many possible true equations including 32 x 15 = 480 and 52 x 15 – 630.
Source: Robert Kaplinsky
Hewwo
These are the solutions my fifth graders in Wisconsin came up with:
59×12=708
26×35=910
27×34=918
Would 52×15 actually be a solution? My students noticed there was a 5 in each factor, which would be using two number twice. 🙂