问题
解答题
计算.(写出解答过程,能应简便方法的要用简便方法)
|
答案
(1)(0.125×8-0.5)×4,
=0.125×8×4-0.5×4,
=4-2,
=2;
(2)(
+1 3
)÷1 2
-3 5
,17 18
=
÷5 6
-3 5
,17 18
=
-25 18
,17 18
=
;4 9
(3)907+907×9-900,
=907×(1+9)-900,
=907×10-900,
=9070-900,
=8170;
(4)9÷[
+(5 6
-5 8
)],1 3
=9÷[
+5 6
],7 24
=9÷
,9 8
=8.