问题
解答题
(1)(-100)+100 (2)(-35)+0 (3)(-0.5)+4.4 (4)(-16)+(-8) (5)(-4.2)+4.25 (6)0-(+52) (7)(-14)-(-15) (8)(-1.24)-(+4.76) (9)(-6)×0 (10)(-0.5)×(-8) (11)(
(12)100×(-1)×(-0.1) (13)(-
(14)|-2
(15)1-(-1)(-1)-(-1)×0 (16)-4.2+5.7-7.6+10.1-5.5 (17)25×
(18)(-5)-(-25)×
|
答案
(1)原式=0;
(2)原式=-35;
(3)原式=4.4-0.5
=3.9;
(4)原式=-24;
(5)原式=0.05;
(6)原式=-52;
(7)原式=-14+15
=1;
(8)原式=-1.24-4.76
=-6;
(9)原式=0;
(10)原式=4;
(11)原式=
×12-1 4
×12+1 2
×121 6
=3-6+2=5-6
=-1;
(12)原式=10;
(13)原式=-
+31 2
+21 4
-53 4 1 2
=-6+6
=0;
(14)原式=2
+1 4
+1-3 4 1 2
=3+1 2
=3
;1 2
(15)原式=1-1-0
=0;
(16)原式=-4.2-5.5+5.7-7.6+10.1
=-9.7+5.7+2.5
=-4+2.5
=-1.5;
(17)原式=25(
-3 4
+1 2
)1 4
=25×1 2
=12.5;
(18)原式=-5-20-3
=-28.