(39+530*400): 100 (54000+840*300): 10 5264: 7*30 4384: 8*50

1.(39+530*400)÷100
    (39+212000)÷100
    212039÷100≈2120.39
2.(54000+840*300)÷10
   (54000+252000)÷10
   306000÷10=30600
3.5264÷7*30
   157920÷7=22560
4.4384÷8*50
    219200÷8=27400