22.2×5.4+44.4×2.3的简便方法?
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22.2×5.4+44.4×2.3
=22.2×5.4+22.2×2×2.3
=22.2×(5.4+2×2.3)
=22.2×10
=222
=22.2×5.4+22.2×2×2.3
=22.2×(5.4+2×2.3)
=22.2×10
=222
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22.2×5.4+44.4×2.3
=44.4×2.7+44.4×2.3
=44.4×(2.7+2.3)
=44.4×5
=222
=44.4×2.7+44.4×2.3
=44.4×(2.7+2.3)
=44.4×5
=222
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