1) 1. 37,8*4=151,2
2. 151,2-111,96=39,24
3. 39,24:12=3,27
2) 1. 87,38:17=5,14
2. 5,14+7,36=12,5
3. 12,5*21=262,5
(37,8×4-111,96) :12= (151,2-111,96)/12= 39,24/12=3,27
1) 1. 37,8*4=151,2
2. 151,2-111,96=39,24
3. 39,24:12=3,27
2) 1. 87,38:17=5,14
2. 5,14+7,36=12,5
3. 12,5*21=262,5