1.2100-21×53+2255 2.(103-336÷21)×15 3.800-(2000-9600÷8) 4.40×48-(1472+328)÷5 5.(488+344)÷(202-194) 6.2940÷28+136×7 7.605×(500-494)-1898 8.(2886+6618)÷(400-346) 9.9125-(182+35×22) 10.(154-7...