方舟国服孤岛哪里有珍珠洞,多说几个,越多越好,一定采纳
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发布时间:2022-05-09 20:45
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时间:2023-10-18 20:19
(1)3.78*1.7+1.7+1.22
=1.7*(3.78+1.22)
=1.7*5
=8.5
(2)43.5*99+43.5
=43.5*(99+1)
=43.5*100
=4350
(3)5.47-(1.47+2.78)
=5.47-1.47-2.78
=4-2.78
=1.22
(4)42*(5/14+1/6)
=15+7
=22
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