14-58 9+814+3 46+3535+46 73-1763-17
27+58= 9+66= 84-38= 90-3=
55+38= 66+14 = 63-36= 100-27=
34+36 = 100-77= 41-18=
算式:
图意:
答:儿童口罩比成人口罩多( )盒
答:一共买了( )盒口罩