2.2✖️9.9+6.6✖️6.7的简便方法?
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2.2×9.9+6.6×6.7=2.2×3×3.3+2×3.3×6.7=3.3×(6.6+13.4)=3.3×20=66
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2.2×9.9+6.6×6.7简便记算:
2.2×9.9+6.6×6.7
=2.2×3×3.3+6.6×6.7
=6.6×3.3+6.6×6.7
=6.6×(3.3+6.7)
=6.6×10
=66
2.2×9.9+6.6×6.7=66。
2.2×9.9+6.6×6.7
=2.2×3×3.3+6.6×6.7
=6.6×3.3+6.6×6.7
=6.6×(3.3+6.7)
=6.6×10
=66
2.2×9.9+6.6×6.7=66。
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2.2x9.9+6.6x6.7
=2.2x3x3.3+6.6x6.7
=6.6x3.3+6.6x6.7
=6.6x(3.3+6.7)
=6.6x10
=66
=2.2x3x3.3+6.6x6.7
=6.6x3.3+6.6x6.7
=6.6x(3.3+6.7)
=6.6x10
=66
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原式=2.2×3×3.3+6.6×6.7
=6.6×3.3+6.6×6.7
=6.6×(3.3+6.7)
=6.6×10
=66
=6.6×3.3+6.6×6.7
=6.6×(3.3+6.7)
=6.6×10
=66
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