2.6✘12+3.8✘5简便运算?
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2.6✘12+3.8✘5
=2x(二点6×6+1点9×5)
=2x(15.6+9.5)
=2x25.1
=50.2
=2x(二点6×6+1点9×5)
=2x(15.6+9.5)
=2x25.1
=50.2
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您好!很高兴回答您的问题!
=(2.5+0.1)x12+3.8x10/2
=2.5x12+0.1x12+38/2
=2.5x4x3+1.2+19
=10x3+1.2+19
=30+1.2+19
=31.2+19
=50.2
望采纳,谢谢!
=(2.5+0.1)x12+3.8x10/2
=2.5x12+0.1x12+38/2
=2.5x4x3+1.2+19
=10x3+1.2+19
=30+1.2+19
=31.2+19
=50.2
望采纳,谢谢!
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2.6×12+3.8×5
=2.6×10+2.6×2十1.9×10
=26+5.2+19
=31.2+19
=50.2
=2.6×10+2.6×2十1.9×10
=26+5.2+19
=31.2+19
=50.2
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