471+317=?,218+491=?,993+763=?
728-48=?,906-660=?,1358-739=?
90+?=877,207+?=771,1252+?=1621
79*7=?,9*88=?,817*4=?
690/3=?,264/8=?,726/6=?
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?-256=824-455,131+187+458+308=?
779-280=?+363,579+575+342-1238=?
201+?+371=949,1050+542-789-632=?
226+?-526=459,1939-661-560-456=?
固体胶粘纸