(1)1300÷25÷4, =1300÷(25×4), =1300÷100, =13; (2)833-243-457, =833-(243+457), =833-700, =133; (3)46×16+16×54, =(46+54)×16, =100×16, =1600; (4)25×125×32, =25×125×(8×4), =(25×4)×(125×8), =100×1000, =100000; (5)1800-800÷25×16, =1800-32×16, =1800-512, =1288; (6)199×47+47, =(199+1)×47, =200×47, =9400. |