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列竖式计算31.04÷3.2等于多少

31.04÷3.2=9.7

31.04÷3.2-4.7 =9.7-4.7 =5

9.7

3.104÷3.2 =31.04÷32 =0.97 竖式见图:

31.04÷3.2=9.7 9.7 ————— 32 ) 310.4 288 ————— 224 224 ————— 0 验算: 3.2 × 9.7 ————— 224 288 ————— 31.04

310.4╱32

解:31.04 ÷ 3.2 + 6.4 = (31×100 + 4)/100 ÷ (3×10 + 2)/10 + (6×10 + 4)/10 = 3104/100 ÷ 32/10 + 64/10 = 3104/100 × 100/320 + 64/10 = 97/10 + 64/10 = (97+64)/10 = 161/10 = 16.1

解题方法:分解法 31.04÷32 =(32-0.96)/32 =1-0.03 =0.97

2.37+1.25=3.62;4.36+2.4=6.76;39.04+3.28=42.32(验算)45.6+34.98=80.58;46.19-23.7=22.49;31.5×24.5=771.75(验算)0.63×1.05=0.6615;0.24×1.5=0.36;84.01÷31=2.71(验算)

首先3.2-4.7先算出来,然后31.04和那个都先扩大一百倍那么算

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