Question

222×333+444×333.5的简便运算

222×333+444×333.5的简便运算

Answer 1

过程

追答

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Answer 2

过程：222×333+222×2×（333+0.5）

           =222×333+222×333×2+222×2×0.5

           =222×（333+333×2+2×0.5）

           =222×（333+666+1）

           =222×1000

           =222000

思路：试着将ab+ac化成a(b+c)

Answer 3

把所有的数字分解为X*111，即2*111+3*111+4*111+3*111+0.5=(2+3+4+3)*111+0.5=(2+10)*111+0.5=1110+222+0.5=1332.5

Answer 4

222×333+444×333.5
=222X333+444X333+444X0.5
=222X(333+666+1)
=222X1000
=222000

Answer 5

222×333+444×333.5
＝222×333+222×333.5×2
＝222×333+222×667
＝222×（333+667）
＝222×1000
＝222000