0.25脳99=

0.25×99
=0.25×（100-1）
=24.75
回答完毕~
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1.25脳0.25x96简便计算
答：1.25脳0.25x96简便计算 1.25脳0.25x96 =1.25÷0.25*96 =5*96 =480

975脳0.25 9 3/4脳76-9.75
答：975x0.25+9 又3/4x76-9.75 =9.75x100x0.25+9.75x76-9.75 =9.75x（100x0.25+76-1)=9.75x（25+75）=9.75x100 =975 谢谢，请采纳

2.8脳0.5-1.8脳0.25
答：2.8×0.5-1.8×0.25 =1.4-0.45 =0.95。

3.2梅0.25脳125脳0.8=?
答：3.2÷0.25×125×0.8 =3.2×4×(125×0.8)=12.8×10 =128。

101×5.4用简便方法计算和32×0.25×1.25用简便计算
答：101*5.4=（100+1）*5.4=100*5.4+5.4=540+5.4=545.4 32*0.25*1.25=4*8*0.25*1.25=（4*0.25）*（8*1.25）=10

1.9×32×125×0.25 用简便计算
答：1.9×32×125×0.25 =1.9×4×8×125×0.25 =1.9×（8×125）×（4×0.25）=1.9× 1000×1 =1900

2.5脳0.36 3.6简便计算
答：2.5脳0.36 3.6简便计算 2.5脳0.36 3.6 =3.6*（0.25+1）=3.6*1.25 =4.5

x+(1+20%)脳90%=x+16过程?
答：（20%x+16）/（x+16）=25%0.2x+16=0.25(x+16)0.2x+16=0.25x+0.25*160.25x-0.2x=16-0.25*160.05x=12x=12÷0.05x=240

1.25脳48脳0.25简便计算
答：1.25x32x0.25 =1.25x8x4x0.25 =10x1 =10

3.26脳0.25 5.39
答：直接计算，没有简便方法：3.26×0.25+5.39 =0.815+5.39 =6.205。