题目内容
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
)2-(-
+
)÷(-
)3
(8)-99
×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)
(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 |
3 |
1 |
2 |
1 |
6 |
(8)-99
71 |
72 |
(9)36×(-14.12)+18×(-4.26)-18×17.5(用简便方法计算)
(1)原式=-5-28
=-33;
(2)原式=-4+1
=-3;
(3)原式=-25×(-4)
=100;
(4)原式=30÷
=900;
(5)原式=-5×(-1)×6
=30;
(6)原式=-56×
+56×
-56×
=-32+21-4
=-15;
(7)原式=
-(-
)÷(-
)=
-
×216
=
-36
=-
;
(8)原式=(
-100)×36
=
×36-100×36=
-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.
=-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×
4 |
7 |
3 |
8 |
1 |
14 |
=-32+21-4
=-15;
(7)原式=
9 |
4 |
1 |
6 |
1 |
216 |
9 |
4 |
1 |
6 |
=
9 |
4 |
=-
135 |
4 |
(8)原式=(
1 |
72 |
=
1 |
72 |
1 |
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.
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