脱式 0.28*4.3+7.2*0.43 78.5+1.5*18/2.5 18.4+1.6*0.4*2.4 (6.8+1.7)*1.2/0.16
问题描述:
脱式 0.28*4.3+7.2*0.43 78.5+1.5*18/2.5 18.4+1.6*0.4*2.4 (6.8+1.7)*1.2/0.16
答
0.28*4.3+7.2*0.43 =2.8*0.43+7.2*0.43=(2.8+7.2)*0.43=10*0.43=4.378.5+1.5*18/2.5 =78.5+27/2.5=78.5+10.8=89.318.4+1.6*0.4*2.4 =18.4+0.64*2.4=18.4+1.536=19.936(6.8+1.7)*1.2/0.16=8.5*1.2/0.16=10.2/0.16...