解方程计算题 计算题:(1)-5+(-15)-(-17)-|-12|(2)(+4.3)-(-4)+(-2.3)-(+4)(3)-191920×(-12)(4
计算题:(1)-5+(-15)-(-17)-|-12|(2)(+4.3)-(-4)+(-2.3)-(+4)(3)-191920×(-12)(4
计算题:(1)-5+(-15)-(-17)-|-12|(2)(+4.3)-(-4)+(-2.3)-(+4)(3)-191920×(-12)(4
(1)-5+(-15)-(-17)-|-12|
=-5+(-15)+17+12
=-20+29
=9;
(2)(+4.3)-(-4)+(-2.3)-(+4)
=4.3+4+(-2.3)+(-4)
=8.3+(-6.3)
=2;
(3)-19
×(-12)
=(20-
)×12
=20×12-
×12
=240-
=239
2 5;
(4)(1
-
7 8-
7 16)×(1
1 7)
=
×
8 7-
7 8×
8 7-
7 16×
8 7=2-1-
1 2=
1 2;
(5)3-5-4÷(-12)
=-2+4×
=-2×
1 3=-
2 3;
(6)60-1998×15
÷2×0
=60-0
=60;
(7)(-5)÷(-
)×5
=5×
×5
=5;
(8)25×
-(-25)×
1 2+25×
1 4=25×(
3 4+
1 2+
1 4)
=25×
=
75 2.
计算题(1)(-12)-5+(-14)-(-39)(2) (-24)×( 1 8 - 1 3 + 1 4 )+(-
(1)原式=-12-5-14+39=-31+39=8;(2)原式=-3+8-6-8=-9;
(3)原式=-16×(- 1 4 )× 1 4
-
1 4×(-12)+5=9.
计算题(1)(+8)+(-6)(2)(-6)-(-5)(3)-2×3×(-4)(4)12-(-18 )+(-7 )-15(5)17-8÷
(1)(+8)+(-6),
=+(8-6),
=2;
(2)(-6)-(-5),
=-6+5,
=-1;
(3)-2×3×(-4),
=2×3×4,
=24;
(4)12-(-18 )+(-7 )-15,
=12+18-7-15,
=30-22,
=8;
(5)17-8÷(-2)+4×(-3),
=17+4-12,
=21-12,
=9;
(6)(-
1 6+
3 4-
1 12)×48,
=-
×48+
3 4×48-

1 12
×48,
=-8+36-4,
=-12+36,
=24;
(7)
1 2+(-
2 3)+
4 5+(-
1 2)+(-
1 3),
=[
+(-
1 2)]+[(-
2 3)+(-
1 3)]+
4 5,
=-1+
,
=-
;
(8)|-1-2|-1÷(-
1 2)×2,
=3-1×(-2)×2,
=3+4,
=7.
计算题:(1)-20+(-17)-(-18)-11;(2)(-1)100×5+(-2)4÷4;(3)用简便方法计算:(14?16+12
(1)-20+(-17)-(-18)-11
=-20-17+18-11
=-48+18
=-30;
(2)(-1)100×5+(-2)4÷4
=1×5+16÷4
=5+4
=9;
(3)(
1 4?
1 6+
1 2)×(-12)
=-
×12+
1 6×12-
1 2×12
=-3+2-6
=-7;
(4)-(-3)2-|(-5)3|×(-
2 5)2-18÷|-32|
=-9-125×
-18÷9
=-9-20-2
=-31.
计算题:(1)(+18)+(-12)(2) (-1.5)× 4 5 ÷(- 2 5 )× 3 4 (3)
(1)(+18)+(-12)=18-12=6;(2)原式=- 3 2 × 4 5
×(-
5 2)×
3 4=
9 4;
(3)原式=48×
-48×
1 4-48×
3 8=32-12-18=2;
(4)原式=-4-(-27)×1=-4+27=23.
计算题.(1)12-(-18)+(-7)-15(2)(-1)10×2+(-2)3÷4+(-22)(3)1÷(-5)×(-15)(4)(
(1)原式=12+18-7-15=30-22=8;
(2)原式=2-2-4=-4;
(3)原式=1×(-
)×(-
1 5)=
1 25;
(4)原式=8-36+4=12-36=-24.
计算题:(1)(-12)÷4×(-6)÷2(2) (- 5 8 )×(-4 ) 2 -0.25×(-5)×(-4 ) 3 (3
(1)(-12)÷4×(-6)÷2=(-12)× 1 4 ×(-6)× 1 2=9.
(2) (-
)×(-4 ) 2 -0.25×(-5)×(-4 ) 3
= -
×16-0.25×(-4)×(-5)×(-4 ) 2 =-10-80=-90 .
(3) (-1
)-1
1 4+(-2
1 2)-(-3
3 4)-(-1
1 4)
= -1
-1
1 4-2
1 2+3
3 4+1
1 4= (-1
1 4+1
1 4)+(-1
1 2-2
1 2)+3
3 4=0-4+3
3 4=-
1 4.
(4) (-3 ) 3 ÷2
1 4×(-
2 3) 2 +4- 2 2 ×(-
1 3)
= -27×
×
4 9+4-4×(-
1 3)
= -
+4+
4 3=0 .
计算题:(1)-7+4(2)(-2)×5(3)(- 3 4 - 5 9 + 7 12 )÷
(1)-7+4=-(7-4)=-3; …(3分)(2)(-2)×5=-10;…(3分)(3)(-
3 4-
5 9+
7 12)÷
1 36=(-
3 4-
5 9+
7 12)×36
=-
×36-
5 9×36+
7 12×36
=-27-20+21
=-26…(3分)
(4)|-
7 9|÷
2 3-
1 3×(-3) 2
=
×
3 2-
1 3×9…(2分)
=
-3
=-
.…(3分)
计算题(1)-7+13-6+20(2)1+(-2)+|-2-3|-5(3)(+4.3)-(-4)+(-2.3)-(+4)(4)(-34?59+712)
(1)原式=(-7-6)+(13+20)=-13+33=20;
(2)原式=1-2+5-5=-1;
(3)原式=4.3+4-2.3-4=2;
(4)原式=(-
-
5 9+
7 12)×36=-27-20+21=-26;
(5)原式=-3×(-6)÷2=
÷2=
1 4;
(6)原式=-1
-1
1 4-2
1 2+3
3 4+1
1 4=-5
1 4+5=-
1 4.