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二点5×4.8的简便运算3种答案一样

2.5×4.8 =2.5×4×1.2 =10×1.2 =12, 2.5×4.8 =5×0.5×4×4×0.3 =(5×4)×(0.5×4)×0.3 =20×2×0.3 =12, 2.5×4.8 =(2.5×4)×(4.8÷4) =10×1.2 =12。

4.8×32。5+3。25×52=4.8×32。5+32。5×5。2=(4.8+5。2)×32。5=10×32。5=325

2.1乘12.5乘4.8,该怎么简便运算的

12.5x4.8 =12.5x8x0.6 =100x0.6 =60

😊

4.8-4.8*0.5=4.8*(1-0.5)=4.8*0.5=2.4

答案见上图 望采纳

(1)6.73×4.8+5.2×6.73=(4.8+5.2)×6.73=10×6.73=67.3;(2)1.6×[(12-7.2)÷(0.84÷2.1)]=1.6×[4.8÷0.4]=1.6×12=19.2;(3)81÷[(3.25+6.75)×0.09]=81÷[10×0.09]=81÷0.9=90;(4)0.45×78.2+20.8×0.45+0.45=0.45×78.2+20.8×0.45+0.45×1=0...

51/5÷(5/3 +4.8×1/8) =51/5÷(5/3+3/5) =51/5÷34/15 =51/5×15/34 =3×3/2 =9/2

3.75×4.8+62.5×0.48 =3.75×4.8+6.25×4.8 =(3.75+6.25)×4.8 =10×4.8 =48

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