问题
解答题
①27.055-1.02-8.99 ②
③0.38×8.17+3.8×0.383-0.76 ④[10-(2
⑤
|
答案
①27.055-1.02-8.99,
=26.035-8.99,
=17.045;
②
÷(1 12
-1 2
),1 3
=
÷1 12
,1 6
=
×6,1 12
=
;1 2
③0.38×8.17+3.8×0.383-0.76
=0.38×8.17+0.38×0.383×10-0.76
=0.38×(8.17+3.83)-0.76,
=0.38×12-0.76,
=4.56-0.76,
=3.8;
④[10-(2
×1 7
+23 8
×1 7
)]÷75 8
,6 7
=[10-2
×(1 7
+3 8
)]÷75 8
,6 7
=[10-2
]×1 7
,7 55
=10×
-7 55
×15 7
,7 55
=
-14 11
,3 11
=1;
⑤
+[21 8
÷(3.4-4 9
)×11 15
],6 11
=
+[1 8
÷(22 9
-17 5
)×11 15
],6 11
=
+[1 8
÷22 9
×8 3
],6 11
=
+[1 8
×22 9
×6 11
],3 8
=
+1 8
,1 2
=
.5 8