数学计算求帮忙,要计算过程!
计算:(1)。丨-1/2丨+丨-1/3丨;(2)。(-2.2)+3.8;(3)。4(1/3)+(-5(1/6));(4)。(-5(1/6)+0);(5)。(+2(1/5)...
计算:
(1)。丨-1/2丨+丨-1/3丨;
(2)。(-2.2)+3.8;
(3)。4(1/3)+(-5(1/6));
(4)。(-5(1/6)+0);
(5)。(+2(1/5))+(-2.2);
(6)。(-(2/15))+(+0.8);
(7)。(-6)+8+(-4)+12;
(8)。1(4/7)+丨-2(1/3)丨+(3/7)+(1/3)
(9)。0.36+(7.4)+0.3+(-0.6)+0.64;
(10)。9+(-7)+10+(-3)+(-9) 展开
(1)。丨-1/2丨+丨-1/3丨;
(2)。(-2.2)+3.8;
(3)。4(1/3)+(-5(1/6));
(4)。(-5(1/6)+0);
(5)。(+2(1/5))+(-2.2);
(6)。(-(2/15))+(+0.8);
(7)。(-6)+8+(-4)+12;
(8)。1(4/7)+丨-2(1/3)丨+(3/7)+(1/3)
(9)。0.36+(7.4)+0.3+(-0.6)+0.64;
(10)。9+(-7)+10+(-3)+(-9) 展开
1个回答
展开全部
计算:
(1)。丨-1/2丨+丨-1/3丨
=1/2+1/3
=5/6
(2)。(-2.2)+3.8
=-2.2+3.8
=1.6
(3)。4(1/3)+(-5(1/6))
=(4-5)+(1/3-1/6)
=-1+1/6
=-5/6
(4)。(-5(1/6)+0=-5又1/6
(5)。(+2(1/5))+(-2.2)
=2.2-2.2
=0
(6)。(-(2/15))+(+0.8)
=-2/15+4/5
=14/15
(7)。(-6)+8+(-4)+12
=2-4+12
=-2+12
=10
(8)。1(4/7)+丨-2(1/3)丨+(3/7)+(1/3)
=(1又4/7+3/7)+(2又1/3+1/3)
=2+2又2/3
=4又2/3
(9)。0.36+(7.4)+0.3+(-0.6)+0.64
=(0.36+0.64)+(7.4+0.3-0.6)
=1+7.1
=8.1
(10)。9+(-7)+10+(-3)+(-9)
=2+10-3-9
=12-12
=0
(1)。丨-1/2丨+丨-1/3丨
=1/2+1/3
=5/6
(2)。(-2.2)+3.8
=-2.2+3.8
=1.6
(3)。4(1/3)+(-5(1/6))
=(4-5)+(1/3-1/6)
=-1+1/6
=-5/6
(4)。(-5(1/6)+0=-5又1/6
(5)。(+2(1/5))+(-2.2)
=2.2-2.2
=0
(6)。(-(2/15))+(+0.8)
=-2/15+4/5
=14/15
(7)。(-6)+8+(-4)+12
=2-4+12
=-2+12
=10
(8)。1(4/7)+丨-2(1/3)丨+(3/7)+(1/3)
=(1又4/7+3/7)+(2又1/3+1/3)
=2+2又2/3
=4又2/3
(9)。0.36+(7.4)+0.3+(-0.6)+0.64
=(0.36+0.64)+(7.4+0.3-0.6)
=1+7.1
=8.1
(10)。9+(-7)+10+(-3)+(-9)
=2+10-3-9
=12-12
=0
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