计算:(要写出过程)(1)-5-4×7(2)-64÷16+1(3)-52×(-22)(4)30÷(15-16)(5)-|-5|×(-1)2009×|+6|(6)(-56)×(47-38+114)(7)

题目简介

计算:(要写出过程)(1)-5-4×7(2)-64÷16+1(3)-52×(-22)(4)30÷(15-16)(5)-|-5|×(-1)2009×|+6|(6)(-56)×(47-38+114)(7)

题目详情

计算:(要写出过程)
(1)-5-4×7
(2)-64÷16+1
(3)-52×(-22
(4)30÷(
1
5
-
1
6

(5)-|-5|×(-1)2009×|+6|
(6)(-56)×(
4
7
-
3
8
+
1
14

(7)(-1
1
2
)2-(-
2
3
+
1
2
)÷(-
1
6
)3

(8)-99
71
72
×36(用简便方法计算)
(9)36×(-14.12)+18×(-4.26)-18×17.5(用简便方法计算)
题型:解答题难度:中档来源:不详

答案

(1)原式=-5-28
=-33;     
(2)原式=-4+1
=-3;     
(3)原式=-25×(-4)
=100;    
(4)原式=30÷class="stub"1
30

=900;     
(5)原式=-5×(-1)×6
=30;
(6)原式=-56×class="stub"4
7
+56×class="stub"3
8
-56×class="stub"1
14

=-32+21-4
=-15;      
(7)原式=class="stub"9
4
-(-class="stub"1
6
)÷(-class="stub"1
216
)=class="stub"9
4
-class="stub"1
6
×216
=class="stub"9
4
-36
=-class="stub"135
4
;  
(8)原式=(class="stub"1
72
-100)×36
=class="stub"1
72
×36-100×36=class="stub"1
2
-3600
=-3599.5;     
(9)原式=-36×14.12-18×4.26-18×17.5
=18×28.24-18×4.26-18×17.5
=-18×(28.24+4.26+17.5)
=-18×50
=-900.

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