①99.7×13+ ×13
②12.78﹣(1.17+2.78)﹣3.83
③910÷1.3×0.7
④67× ﹣9÷1.25+ ×2
26
29
33
58
62
85
79
77
71
7.6+2.4= 9.8﹣1.9= 1﹣35%= =
= 32×25%=