56.5-41.2+42.5-58.8简便计算...题目素56.5-41.2+43.5-58.8
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56.5-41.2+42.5-58.8简便计算...题目素56.5-41.2+43.5-58.856.5-41.2+42.5-58.8简便计算...题目素56.5-41.2+43.5-58.856.5
56.5-41.2+42.5-58.8简便计算...题目素56.5-41.2+43.5-58.8
56.5-41.2+42.5-58.8简便计算
...题目素56.5-41.2+43.5-58.8
56.5-41.2+42.5-58.8简便计算...题目素56.5-41.2+43.5-58.8
56.5-41.2+42.5-58.8
=(56.5+42.5)-(41.2+58.8)
=99-100
=-1
如果本题有什么不明白可以追问,
56.5-41.2+42.5-58.8
=56.5+42.5-41.2-58.8
=56.5+42.5-(41.2+58.8)
=99-100
=-1
不用简便方法按顺序做,答案也不是0啊,是-1,在好好看看吧
56.5-41.2+43.5-58.8
=56.5-43.5+41.2+58.8
=13+100
=113
望采纳⊙▽⊙
56.5+43.5-(41.2+58.5)=0
56.5-41.2+42.5-58.8简便计算...题目素56.5-41.2+43.5-58.8
56.5-41.2+43.5-58.8 怎样简算?
这几道题的简便算法以及得数456-299,456+109,456-109,23+45+55+77,891-238-562,571-(271-48),56.5-41.2+43.5-58.8,25×125×5×2×4×8,25×1.6,125×72,47×56+44×47,99×45,101×45,9.9×45+4.5,101×45-45,56×11 37×12+12×56+12×7,75×21+25×
456+299 456-299 456+109 456-109 23+45+55+77 891-238-562 571-(271-48)56.5-41.2+43.5-58.8 25×125×5×2×4×8 25×1.6 125×72 47×56+47×47 99×45 101×45 9.9×45+4.5 101×45-45 难的:9999+999+99+9 9999×2222+3333×3334 10000-1-2-3-4-...-80 1+2+
56.5乘以9.9乘以56.5简算快点要不然我就死定了
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