0.25×38×0.4×825×78+38÷8799×9798.-六年级数学

题目简介

0.25×38×0.4×825×78+38÷8799×9798.-六年级数学

题目详情

0.25×
3
8
×0.4×8
2
5
×
7
8
+
3
8
÷
8
7
99×
97
98
题型:解答题难度:中档来源:不详

答案

(1)0.25×class="stub"3
8
×0.4×8
=(0.25×0.4)×(class="stub"3
8
×8)
=0.1×3
=0.3;

(2)class="stub"2
5
×class="stub"7
8
+class="stub"3
8
÷class="stub"8
7

=class="stub"2
5
×class="stub"7
8
+class="stub"3
8
×class="stub"7
8

=(class="stub"2
5
+class="stub"3
8
)×class="stub"7
8

=class="stub"31
40
×class="stub"7
8

=class="stub"217
320


(3)99×class="stub"97
98

=(98+1)×class="stub"97
98

=98×class="stub"97
98
+class="stub"97
98

=97+class="stub"97
98

=97class="stub"97
98

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