简便运算.198-(98+37)74×12.5×57×8716×40-516÷140.-数学

题目简介

简便运算.198-(98+37)74×12.5×57×8716×40-516÷140.-数学

题目详情

简便运算.
198-(98+37)
7
4
×12.5×
5
7
×8
7
16
×40-
5
16
÷
1
40
题型:解答题难度:中档来源:不详

答案

(1)198-(98+37 )
=198-98-37,
=100-37,
=63;

(3)class="stub"7
4
×12.5×class="stub"5
7
×8
=(class="stub"7
4
×class="stub"5
7
)×(12.5×8),
=class="stub"5
4
×
100,
=125;

class="stub"7
16
×40-class="stub"5
16
÷class="stub"1
40

=class="stub"7
16
×40-class="stub"5
16
×
40,
=(class="stub"7
16
-class="stub"5
16
)×40,
=class="stub"1
8
×40,
=5.

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