0.12锧0.14锧0.16锧...锧0.88咋么算?

2025-04-28 17:11:08
推荐回答(1个)
回答1:

两头相加后,乘以项数,再除以2:
=(0.12+0.88)×[ (88-12)÷2 +1] ÷ 2
=1×(38+1)÷2
=19.5