2解8分=0.28元,2角6分=0.26元.[(0.28+0.26)+0.26]÷(2-1),=[0.54+0.26]÷1,=0.8÷1,=0.8(元).这种杂
0.28+0.26+0.26=0.80(元);这本杂志每本0.80元.
0.28+0.26+0.26=0.80(元);这本杂志每本0.80元.
=x+1.2 2x-2.8=x+1.2 2x-x=2.8+1.2 x=4 解x-1.6是甲的有的钱数,x-1.2是乙的有的钱数,所以甲乙钱数相加,正好比这好比一
=x+1.2 2x-2.8=x+1.2 2x-x=2.8+1.2 x=4 解x-1.6是甲的有的钱数,x-1.2是乙的有的钱数,所以甲乙钱数相加,正好比这好比一