当a=0.8,b=0.5,9a+8b-5a-6如何简算

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当a=0.8,b=0.5,9a+8b-5a-6如何简算当a=0.8,b=0.5,9a+8b-5a-6如何简算当a=0.8,b=0.5,9a+8b-5a-6如何简算=4a+8b-6=4*0.8+8*0.

当a=0.8,b=0.5,9a+8b-5a-6如何简算
当a=0.8,b=0.5,9a+8b-5a-6如何简算

当a=0.8,b=0.5,9a+8b-5a-6如何简算
=4a+8b-6
=4*0.8+8*0.5-6
=3.2+4-6
=1.2

9a+8b-5a-6
=4a+8b-6
=4x0.8+8x0.5-6
=3.2+4-6
=1.2
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=4a+8b-6
=4*0.8+8*0.5-6
=3.2+4-6
=1.2
祝学习进步

9a+8b-5a-6
=(9a-5a)+8b-6
=4a+8b-6
=4(a+2b)-6
=4*(0.8+2*0.5)-6
=7.2-6
=1.2