问题
解答题
计算:(要写出过程) (1)-5-4×7 (2)-64÷16+1 (3)-52×(-22) (4)30÷(
(5)-|-5|×(-1)2009×|+6| (6)(-56)×(
(7)(-1
(8)-99
(9)36×(-14.12)+18×(-4.26)-18×17.5(用简便方法计算) |
答案
(1)原式=-5-28
=-33;
(2)原式=-4+1
=-3;
(3)原式=-25×(-4)
=100;
(4)原式=30÷1 30
=900;
(5)原式=-5×(-1)×6
=30;
(6)原式=-56×
+56×4 7
-56×3 8 1 14
=-32+21-4
=-15;
(7)原式=
-(-9 4
)÷(-1 6
)=1 216
-9 4
×2161 6
=
-369 4
=-
; 135 4
(8)原式=(
-100)×361 72
=
×36-100×36=1 72
-36001 2
=-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.