怎样计算简便就怎样计算.①1598-490÷18×36②3.2×8×1.25×316③9.6÷1.25+5.4×45④13+815×(56-0.625)-数学

题目简介

怎样计算简便就怎样计算.①1598-490÷18×36②3.2×8×1.25×316③9.6÷1.25+5.4×45④13+815×(56-0.625)-数学

题目详情

怎样计算简便就怎样计算.
①1598-490÷18×36
②3.2×8×1.25×
3
16

③9.6÷1.25+5.4×
4
5

1
3
+
8
15
×(
5
6
-0.625)
题型:解答题难度:中档来源:不详

答案

①1598-490÷18×36,
=1598-490×(36÷18),
=1598-490×2,
=1598-980,
=618;

②3.2×8×1.25×class="stub"3
16

=(3.2×1.25)×(8×class="stub"3
16
),
=4×class="stub"3
2

=6;

③9.6÷1.25+5.4×class="stub"4
5

=(9.6+5.4)×class="stub"4
5

=15×class="stub"4
5

=12;

class="stub"1
3
+class="stub"8
15
×(class="stub"5
6
-0.625),
=class="stub"1
3
+class="stub"8
15
×
class="stub"15
24

=class="stub"1
3
+class="stub"1
3

=class="stub"2
3

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