问题
解答题
用递等式计算,能简算的要简算 14×75-624÷39 (7.6-3.6÷2)×1.5
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答案
(1)14×75-624÷39
=150×7-208÷13,
=1050-16,
=1034;
(2)(7.6-3.6÷2)×1.5
=(7.6-1.8)×1.5,
=5.8×1.5,
=8.7;
(3)
-4 5
÷1 3 7 15
=
-4 5
×1 3
,15 7
=
-4 5
,5 7
=
;3 35
(4)
÷9+5 7
×4 7 1 9
=
×5 7
+1 9
×4 7
,1 9
=(
+5 7
)×4 7
,1 9
=
×9 7
,1 9
=
;1 7
(5)
+(2 3
-5 6
)÷3 4 3 8
=
+2 3
×1 12
,8 3
=
+2 3
,2 9
=
;8 9
(6)
÷[7 11
-(1-2 5
)]7 10
=
÷[7 11
-2 5
],3 10
=
÷7 11
,1 10
=
×10,7 11
=
.70 11