[49007 ÷ 7 + 15884] ÷ 5 = 8403 - 70215 ÷ 5 + 3007= [72000 ÷ 900 + 810 ÷ 9] × 2=
1)(49007 ÷ 7 + 15884)÷ 5 (7001+15884)÷5 22885÷5=4577 2)8403 - 70215 ÷ 5 + 3007 8403-14043+3007=-2633 3)(72000 ÷ 900 + 810 ÷ 9) × 2 (80+90)×2 170×2=340