谁知道这一题怎么写
3个回答
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3、
0.25*48
=0.25*(4*12)
=(0.25*4)*12
=1*12
=12
(20.8/0.8)/0.5
=20.8/(0.8*0.5)
=20.8/0.4
=208/4
=52
8.5*4.75-2.75*8.5
=8.5*(4.75-2.75)
=8.5*2
=17
6.48/[(1.4-0.8)*0.9]
=6.48/[0.6*0.9]
=(6.48/0.9)/0.6
=7.2/0.6
=12
1.7+(4.25/2.5)*99
=1.7+1.7*99
=1.7+(1+99)
=1.7*100
170
0.25*48
=0.25*(4*12)
=(0.25*4)*12
=1*12
=12
(20.8/0.8)/0.5
=20.8/(0.8*0.5)
=20.8/0.4
=208/4
=52
8.5*4.75-2.75*8.5
=8.5*(4.75-2.75)
=8.5*2
=17
6.48/[(1.4-0.8)*0.9]
=6.48/[0.6*0.9]
=(6.48/0.9)/0.6
=7.2/0.6
=12
1.7+(4.25/2.5)*99
=1.7+1.7*99
=1.7+(1+99)
=1.7*100
170
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