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12.6 0.28的竖式计算

12.6除0.28=45 验算:45*0.28=12.6

12.6÷0.28=45,竖式如下:先把除数扩大100倍去掉小数点使它变成整数被除数也同时扩大100倍扩展资料竖式计算规则减法相同数位对齐,若不够减,则向前一位借1当10.除法如42除以7.从4开始除〔从高位到低位〕.除法用竖式计算时,

12.6÷0.28=45 45 28)1260 112 140 140 0

12.6÷0.28=45 4 5 ------------------ .28 l 1 2 . 6 0 1 1 2 ---------------------- 1 4 0 1 4 0 ---------------- 0

12.6÷0.28=45;验算: 0.28* 45 1 40 11 2 12.60 ;2.34*0.15=0.351; 2.34*0.15 11 70 23 4 0.35 10 ;验算: 0.15*2.34 60 4 5 30 .0.3510 ;3.82*0.93≈3.6; 3.82*0.93 11 46 3 43 8 3.55 26 ;5.63÷6.1≈0.92;.

12.6÷0.28 = 45能除尽:

1) 4.6 45* 0.2 5 28 √1260 ←12.6 / 0.28 = 1260 / 28───── 112 2 3 0 ───── 9 2 140────── 1401.1 5 0 ───── 0

(1)(825+175)÷25*4 =1000÷25*4 =40*4 =160; (2)7.41+5.66+13.59-4.46 =7.41+13.59+(5.66-4.46) =21+1.2 =22.2; (3)125*(32+32)*25 =125*64*25 =125*8*(8*25) =1000*200 =200000; (4)9.14-4.57+0.57 =9.14-(4.57-0.57) =9.14-4 =5.14; (5)6.5*35+65*6.5 =6.5*(35+65) =6.5*100 =6500; (6)3960÷[145-(27+88)] =3960÷[145-115] =3960÷30 =132.

-----1.25---*0.28 __________----1000----250-------------0.3500

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