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8.3一2.63计算下面各题

5.67

4.36十8.3十14.64十1.7=(4.36+14.64)+(8.3+1.7)=19+10=29

8.3-2.6-0.03=5.7-0.03=5.47

14.8-8.3+1.7=6.5+2-0.3=8.2

8.3-2.63+2.73*1.5=8.3-(2.73-0.1)+2.73*1.5=8.3+0.1-2.73+2.73*1.5=8.4+2.73*(1.5-1)=8.4+2.73*0.5=8.4+1.365=9.765

=8.3-2.63+2.73*1+2.73*0.5 =8.3+0.1+1.365 =9.565

①45-0.35+6.93 =44.65+6.93=51.58;②8.3-0.46-l.237=7.84-1.237=6.603;③2-(1.75-0.25)=2-1.5=0.5;④38.6+1.28+1.46=39.88+1.46=41.34;⑤26.8+15.25-8.89=42.05-8.89=33.16;⑥7.4+5.96-3.86=13.36-3.86=9.5.

8.3-2.63=5.67没有简算,直接计算

(1)5.6*0.83+0.34*8.3=5.6*0.83+3.4*0.83=(5.6+3.4)*0.83=9*0.83=7.47 (2)0.36÷〔0.4*(6.1-4.6)〕=0.36÷(0.4*1.5)=0.36÷0.6=0.6(3)14.35-(4.35-2.69)=14.35-4.35+2.69=10+2.69=12.69(4)12-1.4*1.6=12-2.24=9.76

4.36十8.3十14.64十1.7=1.7十8.3十14.64十4.36=10+19=29

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