4 10 x 21 July 8, 2019 16 32 64 128 4 3 10 21 x 4 7 x 10 21 2x 10 x 4 21 7 10 x 4 21 as a fraction 3 4 x 21 )= 10 1 2 21 3 10 4 x (- 2 1 4 x 10 puissance 21 10 x 10 40 4 2 x 10 4 x21
