怎样算简便就怎样算。 7.28-(0.38+3.28) 3.15+1.83+6.85+2.
怎样算简便就怎样算。7.28-(0.38+3.28)3.15+1.83+6.85+2.1713.86-2.9910.78-1.54-2.464.72-3.98+5.28-...
怎样算简便就怎样算。
7.28-(0.38+3.28) 3.15+1.83+6.85+2.17 13.86-2.99 10.78-1.54-2.46
4.72-3.98+5.28-2.02 8.44-(5.44+2.8) 展开
7.28-(0.38+3.28) 3.15+1.83+6.85+2.17 13.86-2.99 10.78-1.54-2.46
4.72-3.98+5.28-2.02 8.44-(5.44+2.8) 展开
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2014-12-24 · 知道合伙人教育行家
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7.28-(0.38+3.28) 3.15+1.83+6.85+2.17
=7.28-3.28-0.38 =(3.15+6.85)+(1.83+2.17)
=4-0.38 =10+4
=3.62 =14
13.86-2.99 10.78-1.54-2.46
=13.86-3+0.01 =10.78-(1.54+2.46)
=10.86+0.01 =10.78-4
=10.87 =6.78
4.72-3.98+5.28-2.02 8.44-(5.44+2.8)
=(4.72+5.28)-(3.98+2.02) = 8.44-5.44-2.8
=10-6 =3-2.8
=4 =0.2
=7.28-3.28-0.38 =(3.15+6.85)+(1.83+2.17)
=4-0.38 =10+4
=3.62 =14
13.86-2.99 10.78-1.54-2.46
=13.86-3+0.01 =10.78-(1.54+2.46)
=10.86+0.01 =10.78-4
=10.87 =6.78
4.72-3.98+5.28-2.02 8.44-(5.44+2.8)
=(4.72+5.28)-(3.98+2.02) = 8.44-5.44-2.8
=10-6 =3-2.8
=4 =0.2
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