2.1×6.6+4.2×1.4+0.63×2用简便方式如何计算?
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简便算法如下:
2.1×6.6+4.2×1.4+0.63×2
=2.1x6.6+2.1x2x1.4+2.1x0.3x2
=2.1x6.6+2.1x2.8+2.1x0.6
=2.1x(6.6+2.8+0.6)
=2.1x10
=21
2.1×6.6+4.2×1.4+0.63×2
=2.1x6.6+2.1x2x1.4+2.1x0.3x2
=2.1x6.6+2.1x2.8+2.1x0.6
=2.1x(6.6+2.8+0.6)
=2.1x10
=21
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原式变为:
4.2ⅹ(3.3+1.4)+0.7x0.3ⅹ3x2
=4.2ⅹ4.7+4.2ⅹ0.3
=4.2ⅹ(4.7+0.3)
=4.2ⅹ5
=21
4.2ⅹ(3.3+1.4)+0.7x0.3ⅹ3x2
=4.2ⅹ4.7+4.2ⅹ0.3
=4.2ⅹ(4.7+0.3)
=4.2ⅹ5
=21
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2.1×6.6+4.2×1.4+0.63×2
=2.1×6.6+2.1×2.8+2.1×0.6
=2.1×(6.6+2.8+0.6)
=2.1×10
=21
=2.1×6.6+2.1×2.8+2.1×0.6
=2.1×(6.6+2.8+0.6)
=2.1×10
=21
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=2.1×6.6+2.1×2×1.4+2.1×0.3×2
=2.1×(6.6+2.8+0.6)
=2.1×10
=21
=2.1×(6.6+2.8+0.6)
=2.1×10
=21
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