简算101*26.9-1.25*26.9*0.8
问题描述:
简算101*26.9-1.25*26.9*0.8
9.9*9.9+0.99
3.7*0.2+4.5
67.2-7.8*4.9
答
101*26.9-1.25*26.9*0.8=101*26.9-1.25*0.8*26.9=101*26.9-26.9=(101-1)*26.9=26.9*100=26909.9*9.9+0.99=9.9*9.9+9.9*0.1=9.9*(9.9+0.1)=9.9*10=993.7*0.2+4.5=0.37*2+2.75*2=(0.37+2.75)*2=3.12*2=6.2467.2-...