3.9乘以2.7加35×0.7
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3.9×2.7+35×0.7
=3.9×2+3.9×0.7+35×0.7
=7.8+0.7×(3.9+35)
=7.8+0.7×38.9
=7.8+0.7×40-0.7×1.1
=7.8+28-0.77
=35.8-0.77
=35.03
=3.9×2+3.9×0.7+35×0.7
=7.8+0.7×(3.9+35)
=7.8+0.7×38.9
=7.8+0.7×40-0.7×1.1
=7.8+28-0.77
=35.8-0.77
=35.03
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3.9×2.7+35×0.7
=10.53+24.5
=35.03
=10.53+24.5
=35.03
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3.9×2.7十35×0.7
=(4-0.1)×2.7十70×0.7÷2
=10.8-0.27十49÷2
=10.53十24.5
=35.03
=(4-0.1)×2.7十70×0.7÷2
=10.8-0.27十49÷2
=10.53十24.5
=35.03
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