简算下面各题 2.5×(2.8×0.04) （8×2.57）×1.25 36×0.25+64×0.25 0.04×29+0.04

0.28 25.7 25 1.2

2.5×(2.8×0.04)=2.5×0.04×2.8=0.1×2.8=0.28
（8×2.57）×1.25 =8×1.25 ×2.57=10×2.57=25.7
36×0.25+64×0.25 =（36+64）×0.25=100×0.25=25
0.04×29+0.04=0.04×29+0.04×1=0.04×（29+1）=0.04×30=1.2

2.5×(2.8×0.04)
=2.5*4*2.8/100
=28/100
=0.28
（8×2.57）×1.25
=8*1.25*2.57
=10*2.57
=25.7
36×0.25+64×0.25
=(36+64)*0.25
=100*0.25
=25
0.04×29+0.04*71
=0.04*(29+71)
=0.04*100
=4