计算下面各题.657+360÷45×1921×34÷45×82128.6-(12.6+18.4)÷1.6(34+56)÷1924+89.-数学

题目简介

计算下面各题.657+360÷45×1921×34÷45×82128.6-(12.6+18.4)÷1.6(34+56)÷1924+89.-数学

题目详情

计算下面各题.
657+360÷45×1921×
3
4
÷
4
5
×
8
21
28.6-(12.6+18.4)÷1.6
3
4
+
5
6
)÷
19
24
+
8
9
题型:解答题难度:中档来源:不详

答案


(1)657+360÷45×19,
=657+8×19,
=657+152,
=809;

(2)21×class="stub"3
4
÷class="stub"4
5
×class="stub"8
21

=21×class="stub"3
4
×class="stub"5
4
×class="stub"8
21

=(21×class="stub"8
21
)×(class="stub"3
4
×class="stub"5
4
),
=8×class="stub"15
16

=class="stub"15
2


(3)28.6-(12.6+18.4)÷1.6,
=28.6-31÷1.6,
=28.6-19.375,
=9.225;

(4)(class="stub"3
4
+class="stub"5
6
)÷class="stub"19
24
+class="stub"8
9

=class="stub"19
12
÷class="stub"19
24
+class="stub"8
9

=2+class="stub"8
9

=2class="stub"8
9

更多内容推荐