先画树状算图,再用逆推法求框中的数.(1)121.26-______+89.56=92.65(2)38.66-______-6

2025-04-04 11:29:41
推荐回答(1个)
回答1:

(1)121.26-□+89.56=92.65;
121.26-□=3.09,
□=121.26-3.09,
□=118.17,

(2)38.66-(□-6.73)=35.16;
□-6.73=3.5,
□=6.73+3.5,
□=10.23,

(3)60-(□+12.3)=31.9.
60-□-12.3=31.9,
47.7-□=31.9,
□=47.7-31.9,
□=15.8.
故答案为:118.17;10.23;15.8.