Question

直接写得数 4 15 ×60 9 7 × 2 3 1- 4 7

直接写得数 4 15 ×60 9 7 × 2 3 1- 4 7 2 3 × 3 2 999 1000 ×0 7 4 × 7 4 ．

Answer 1

4 15 ×60=16 9 7 × 2 3 = 6 7 1- 4 7 = 3 7 2 3 × 3 2 =1 999 1000 ×0=0 7 4 × 7 4 = 49 16 ．