1.7-(4.875-2.75)×80%
=1.7-2.125×0.8
=1.7-1.7
=0
这题简算,如果化成分数也麻烦,不适合简算
=1.7-(4+0.875-2-0.75)x0.8
=1.7-(4-2+0.875-0.75)x0.8
=1.7-(2+0.125)x0.8
=1.7-(2x0.8+0.125x0.8)
=1.7-(1.6+0.1)
=1.7-1.7
=0
1.7-(4.875-2.75)×80%
= 1.7 -2.125x0.8
=1.7 - 17/8 x 8/10
= 1.7 - 17/10
=1.7-1.7
=0
原式=1.7-2.125×0.8
=1.7-1.7=0