(口算)4+6+8+10+12+14+16+18+20+22+24+26+28+30+32+34+36

(口算)4+6+8+10+12+14+16+18+20+22+24+26+28+30+32+34+36.
2025-06-24 18:24:12
推荐回答(1个)
回答1:

4+6+8+10+12+14+16+18+20+22+24+26+28+30+32+34+36
=(4+36)×17÷2
=40×17÷2
=340