问题
解答题
计算,能简算的要简算. (1)46.7-15.03-4.97 (2)709-4832÷16 (3)(
(4)
|
答案
(1)46.7-15.03-4.97
=46.7-(15.03+4.97),
=46.7-20,
=26.7;
(2)709-4832÷16
=709-4832÷(8×2),
=709-4832÷8÷2,
=709-604÷2,
=709-302,
=407;
(3)(
+1 9
)÷4+1 27 27 23
=
÷4+4 27
,27 23
=
+1 27
,27 23
=1
;131 621
(4)
×[2 3
+(9 10
-7 16
)]1 4
=
×[2 3
+9 10
],3 16
=
×2 3
+9 10
×2 3
,3 16
=
+3 5
,1 8
=
.29 40