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3.25+2.9-1.25简算

1、0.4x(2.5-0.25)+2.9 =2.5*0.4-0.4*0.25+2.9 =1-0....

把25点9拆程256加3在用分配率就很好算了。

21/25x2/3+9/25x2/3-2/3 =(21/25+9/25-1)x2/3 =1/5x2/...

1/10

=25×8×3 =(25×8)x3 =200x3 =600

38+8=p三 25-8=66 62×3=36 6 6 + 2...

21/25×2/3+9/25×2/3-2/3 =2/3×(21/25+9/25-1) =2/3×5/...

脱式计算 (3/4+1/6)*2/3 =3/4*2/3+1/6*2/3 =1/2+1/9 ...

简便计算3/5÷6/25×2/9 =3/5x25/6x2/9 =15/6x2/9 =30/6/...

3×12-33.46÷0.35 =36-95.6=-59.612.74-0.125+2.26-9.8...

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