问题
解答题
计算: ①108-4830÷69 ②
③168-7.5-2.5+32 ④(
⑤
|
答案
①108-4830÷69,
=108-70,
=38;
②
×1 4
+5 13
×3 4
,5 13
=(
+1 4
)×3 4
,5 13
=1×
,5 13
=
;5 13
③168-7.5-2.5+32,
=(168+32)-(7.5+2.5),
=200-10,
=190;
④(
-1 4
÷4)÷1 5
,3 10
=(
-1 4
)÷1 20
,3 10
=
÷1 5
,3 10
=
;2 3
⑤
+7 11
×(4 11
×11 12
),2 3
=
+7 11
×4 11
×11 12
,2 3
=
+7 11
×1 3
,2 3
=
+7 11
,2 9
=
.85 99