①76+8=
②29+71=
③60+23=
④98-56=
⑤56-7=
⑥100-62=
27+58= 9+66= 84-38= 90-3=
55+38= 66+14 = 63-36= 100-27=
34+36 = 100-77= 41-18=
83-16= 72-57= 36+54= 14+29=
43-8= 48+47= 94-36=
85+15= 98-89= 38+19=
75+4 = 50-36= 27+35=
答:儿童口罩比成人口罩多( )盒
答:一共买了( )盒口罩