6.66×3.3+0.666×67的简便计算?
用扩缩法计算:6.66×3.3 66.6×0.66 0.666?
解答:6.66x3.3+66.6x0.66+0.666 =66.6x0.33+66.6x0.66+66.6x0.01 =(0.33+0.66+0.01)x66.6 =1x66.6 =66.6
解答:6.66x3.3+66.6x0.66+0.666 =66.6x0.33+66.6x0.66+66.6x0.01 =(0.33+0.66+0.01)x66.6 =1x66.6 =66.6