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Activities

Fun With Four Four's

Activities

Using four 4's and the number operations, think of the ways to get the numbers 1, 2, 3, 4, 6, 7, 8, 9, 10.

Solution

1 = 44/44; or (4 + 4) / (4 + 4) or (4 x 4) / (4 x 4) etc.;

2 = 4/4 + 4/4, or 4 x 4 / (4 + 4) ;

3 = (4 + 4 + 4) / 4 or [(4 x 4) -4] / 4;

4 = 4 + 4 x (4 -4);

5 = [(4 x 4) + 4] / 4

6 = (4 + 4) / 4 + 4;

7 = 4 + 4 -4/4, or 44/4 -4;

8 = 4 + 4 + 4 -4, or 4 x 4 -4 -4;

9 = 4 + 4 + 4/4;

10 = (44 -4) / 4

***
Source: Numeracy Counts !, Anita Rampal, R Ramanujam and L S Saraswati, N L R C, LBS National Academy of Administration, Mussoorie.

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