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1.2×2.5+0.8×2.5=?简便计算 竖式

4×0.8×2.5 =0.8x(4x2.5) =0.8x10 =8

竖式

1.5×2.4=3.6 1.5×2.4 . 6 0 3 0 3.6 01.08×2.5=2.7 1.0 8× 2.5 . 5 4 0 2 1 6 2.7 0 01.2×0.35=0.42 1.2×0.3 5 . 6 0 3 6 0.4 2 00.72×3.1=2.232 0.7 2× 3.1 . 7 2 2 1 6 2.2 3 24.6×1.02=4.692 1.0 2× 4.6 . 6 1 2 4 0 8 4.6 9 23.05×1.4=4.27 ...

1.2÷0.8 = 1.5本题除得尽,得到1位小数:

(1)2.5*32*0.125 =(2.5*4)*(8*0.125) =10*1 =10 (2)3.5-7+6.5 =3.5+6.5-7 =3 (3)1.2×2.5+0.8×2.5 =2.5(1.2+0.8) =25 (4)8.9×1.25-0.9×1.25 =1.25(8.9-0.9) =10 (5)12.5×7.4×0.8 =12.5×0.8×7.4 =74 (6)6.5×9.5+6.5×0.5 =6.5×(9....

请列一下0.8×0.8的竖式怎么计算? 0.8×0.8=0.64

0.8×1.53=1.224,竖式如图:

0.8 × 2.1 = 1.68 竖式见图:

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