能简算的要简算.(1)34×78+18÷43(2)1.25×32×2.5(3)360÷[56×(37-38)](4)24×(38+56)-数学

题目简介

能简算的要简算.(1)34×78+18÷43(2)1.25×32×2.5(3)360÷[56×(37-38)](4)24×(38+56)-数学

题目详情

能简算的要简算.
(1)
3
4
×
7
8
+
1
8
÷
4
3

(2)1.25×32×2.5
(3)360÷[56×(
3
7
-
3
8
)]
(4)24×(
3
8
+
5
6
题型:解答题难度:中档来源:不详

答案

(1)class="stub"3
4
×class="stub"7
8
+class="stub"1
8
÷class="stub"4
3

=class="stub"3
4
×class="stub"7
8
+class="stub"1
8
×class="stub"3
4

=(class="stub"7
8
+class="stub"1
8
)×class="stub"3
4

=1×class="stub"3
4

=class="stub"3
4


(2)1.25×32×2.5,
=1.25×8×4×2.5,
=(1.25×8)×(4×2.5),
=10×10,
=100;

(3)360÷[56×(class="stub"3
7
-class="stub"3
8
)],
=360÷[56×class="stub"3
7
-56×class="stub"3
8
],
=360÷[24-21],
=360÷3,
=120;

(4)24×(class="stub"3
8
+class="stub"5
6
),
=24×class="stub"3
8
+24×class="stub"5
6

=9+20,
=29.

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