问一道数学题(要简算)52.3×0.9+5.23
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![问一道数学题(要简算)52.3×0.9+5.23](/uploads/image/z/32840-8-0.jpg?t=%E9%97%AE%E4%B8%80%E9%81%93%E6%95%B0%E5%AD%A6%E9%A2%98%EF%BC%88%E8%A6%81%E7%AE%80%E7%AE%97%EF%BC%8952.3%C3%970.9%2B5.23)
问一道数学题(要简算)52.3×0.9+5.23
问一道数学题(要简算)
52.3×0.9+5.23
问一道数学题(要简算)52.3×0.9+5.23
52.3*0.9+5.23
=5.23*10*0.9+5.23
=5.23*(10*0.9)+5.23
=5.23*9+5.23
=5.23*(9+1)
=5.23*10
=52.3
或者
52.3*0.9+5.23
=52.3*0.9+52.3*0.1
=52.3*(0.9+0.1)
=52.3*1
=52.3
你看哪个好理解用哪个..
以上*均表示×
52.3×(1-0.1)+5.23
=52.3-5.23+5.23
=52.3
不懂Hi我
52.3×0.9+5.23
=5.23×【10*0.9+1】
=5.23×【9+1】
=5.23×10
=52.3
52.3×0.9+5.23×1
=52.3×0.9+52.3×0.1
=52.3×(0.9+0.1)
=52.3×1
=52.3