43+38= 57-28= 69+27= 47-29=
72-56= 28+64= 95-26= 45+36=
45+55=
38-26=
57+25=
87-78=
24-15=
100-32=
47+24=
90-25=
31+47=
60+70=
88-28=
46-18=
52+35=
33+47=
77-37=
85-26=
25+34=
49+36=
65-36=
83-46=
45+38=
73-37=
36+33=
43-28=
57-25=
34+54=
34+15=
91-47=
70-35=
26+39=
27+53=
90-62=
48-18=
45+24=
52+35= 23+69= 47+33= 36+20=
62-18= 60-26= 86-37= 35-26=
86-26= 50-19= 61+35= 47+28=
答:儿童口罩比成人口罩多( )盒
答:一共买了( )盒口罩