问题
解答题
正确、合理、灵活的计算下面各题. ①(1.75×0.2+1.75×0.8)÷17.5 ②10
③243×8
④
⑤0.91÷
⑥(
|
答案
(1)(1.75×0.2+1.75×0.8)÷17.5,
=1.75×(0.2+0.8)÷17.5,
=1.75×1÷17.5,
=1.75÷17.5,
=0.1;
(2)10
-(61 4
-21 4
),1 5
=10
-61 4
+21 4
,1 5
=4+2
,1 5
=6
;1 5
(3)243×8
+75.7×82.5,1 4
=(24.3+75.7)×82.5,
=100×82.5,
=8250;
(4)
×13 8
+125%+0.625×1.25,1 4
=1.25×(
+1+0.625),3 8
=1.25×2,
=2.5;
(5)0.91÷
+1.25×10.9,4 5
=1.25×(0.91+10.9),
=1.25×11.81,
=14.7625;
(6)(
+5 6
-7 8
)÷5 12
,1 24
=
×24+5 6
×24-7 8
×24,5 12
=20+21-10,
=31.