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初一数学

发布时间:2013-10-18 08:03:37  

(1) 23+(-73) (2) (-84)+(-49)

(3) 7+(-2.04) (4) 4.23+(-7.57)

(5) (-7/3)+(-7/6) (6) 9/4+(-3/2)

(7) 3.75+(2.25)+5/4 (8) -3.75+(+5/4)+(-1.5)

(9) (-17/4)+(-10/3)+(+13/3)+(11/3) (10) (-1.8)+(+0.2)+(-1.7)+(0.1)+(+1.8)+(+1.4)

(11) (+1.3)-(+17/7) (12) (-2)-(+2/3)

(13) |(-7.2)-(-6.3)+(1.1)| (14) |(-5/4)-(-3/4)|-|1-5/4-|-3/4|)

(1)-5-9+3;

(3)-3-4+19-11; (4)

(5)-4.2+5.7-8.4+10; (6)6.1-3.7-4.9+1.8

(1)(—36)—(—25)—(+36)+(+72);

(3)(4)—9+(—3 )+3

(5) -40-28-(-19)+(-24)-(-32)

2)10-17+8; -8+12-16-23 ; 2)(—8)—(—3)+(+5)—(+9); 4) 12-(-18)+(-7)-15; 6)4.7-(-8.9)-7.5+(-6); ((( (

①(+3.7)-(-2.5)+(-3.5)-(+2.4) ②(-1 )-(+1 )+(-2 )-(-3 )-(-1 )+4

① -11-9-7+6-8+10 ② -5.75-[-3 +(-5 )]-3.125

(1) -5 -(-1 )+(-3 )-6 (2) -7.2-2.6+15.6-10.2-6+4.3

(3)(-1 )-1 +(-2 )-(-3 )-(-1 )+4 (4) |-2 |+(-3.7)+|-(+2.7)|-|-(7 )|

(1)-5-9+3; (2)10-17+8;

(3)-3-4+19-11; (4)-8+12-16-23.

(1)-4.2+5.7-8.4+10; (2)6.1-3.7-4.9+1.8;

(1)(-36)-(-25)-(+36)+(+72); (2)(-8)-(-3)+(+5)-(+9);

(3)(4)-9+(-3 )+3 ; (1)12-(-18)+(-7)-15;

(2)-40-28-(-19)+(-24)-(-32); (3)4.7-(-8.9)-7.5+(-6);

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