4 7 10 x 2 3 July 8, 2019 16 32 64 128 10 2 x 7 )- 4 3 x 6 )- 1 4 x 2 7 8x 3 2x /- 10 4 x 6 )+ 10 7 x 2 )- 3x 3 7 10 x 2 1 4 10 x 7 4 x 3 2 9 7 3x 1 4 10 x 2 2 3 4 x 7 10 as a fraction 2 x 10 )+ 7 4 3х 4/7 x 10 4 7-10 2= 4 × 10-7