71222177

×31+ ×+

3232

3337×36

13.5×27+13.5×72+13.5 1.5

5.3×1

4

+2.7×25%

28×21.6－2.8×16 17

33533

37

×38 ×7.4+0.6×150%+223

0.67×10.1－6.7 5.6×1.7＋0.56×83