6059 67+3399 29+5858+29
9395 64-1650 70-2170-22
27+58= 9+66= 84-38= 90-3=
55+38= 66+14 = 63-36= 100-27=
答:儿童口罩比成人口罩多( )盒
答:一共买了( )盒口罩
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