26.75+2.8+3.75简便运算怎么做
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26.75+2.8+3.75=26.75+3.75+2.8=30.5+2.8=33.3
咨询记录 · 回答于2022-11-13
26.75+2.8+3.75简便运算怎么做
26.75+2.8+3.75=26.75+3.75+2.8=30.5+2.8=33.3
83.9=19.7怎么做
中间怎么是等号?
减号
83.9-19.7=83.9-20+0.3=63.9+0.3=64.2
12.64-3.82+6.36-4.18怎么做
12.64-3.82+6.36-4.18=12.64+6.36-3.82-4.18=19-(3.82+4.18)=19-8=11