52+53+54+55+56+57+58=______
52+53+54+55+56+57+58=______
日期:2021-06-28 10:37:14 人气:1
52+53+54+55+56+57+58, =(52+58)×7÷2, =110×7÷2, =770÷2, =385. 故答案为:385. |
52+53+54+55+56+57+58=______
52+53+54+55+56+57+58, =(52+58)×7÷2, =110×7÷2, =770÷2, =385. 故答案为:385. |