问题
解答题
|
答案
①
×25 8
+22 3
÷11 3
,1 3
=
+5 3
,7 4
=
;41 12
②4.85×2+4.85÷
+4.851 97
=4.85×2+4.85×97+4.85×1,
=4.85×(2+97+1),
=4.85×100,
=485;
③(1
+4 5
×32 9
)÷23 4
,19 30
=(1
+4 5
)÷25 6
,19 30
=
×79 30
,30 79
=1;
④5
×3.5+0.729×4 7
,2 9
=19.5+0.162,
=19.662;
⑤40×39
,39 40
=40×(39+
),39 40
=40×39+40×
,39 40
=40×39+39,
=1560+39,
=1599;
⑥80×
÷1 8
×1 800
,1 800
=80×
×800×1 8
,1 800
=10.