1) (-90)-(-23);
2) (+39)-(+50); 3) (-74)-(-88); 4) (+74)-(-75); 5) (-77)-(+51); 6) (+31)-(-66); 7) (-11)-(-18); 8) (+42)-(+51); 9) (-19)-(-35);
(1) 4+5-11;
(2) 24-(-16)+(-25)-15= (3) -7.2+3.9-8.4+12= (7) 12-(-18)+(-7)-15 (8)(83)(26)(41)(15) (1)
15531456372667
(2) (-1.5)+134+(+3.75)+
412 (3)52111343514 (4)4213832131235 25(11)232332413(1.75) (6) 478511124438(7)112114212313414(8) 151.226563.4(1.2)
(9) (-321)-5
14
(-12.5)-(-7.5)
(-26)―(-12)―12―18
―1―(-12)―(+32)
(-20)-(+5)-(-5)-(-12) (-23)―(-59)―(-3.5) |-32|―(-12)―72―(-5) (-
14)―(-58)―18
(+103)―(-47)―(-25)―107(-165)―3―(-3.2)―7 (-8)+(-10)+2+(-1) (-23)+0+(+14)+(-16)+(-12)
(-8)+(-312)+2+(-12)+12 535+(-523)+425+(-13)
(-6.37)+(-334)+6.37+2.75 (-20)-(+5)-(-5)-(-12)
(-23)―(-59)―(-3.5) |-32|―(-12)―72―(-5)
(-0.5)-(-314)+6.75-512
(+6.1)―(-4.3)―(-2.1)―5.1 (-23)―(-134)―(-123)―(+1.75)
(-323)―(-234)―(-123)―(-
1.75)
-834-579+416-329 -434+16+(-23)―52
0.5+(-14)-(-2.75)+12
(+4.3)-(-4)+(-2.3)-(+4)13×(-5)+13×(-13) (-4)×(-10)×0.5×(-3)
(-38)×43×
(-1.8) (-0.25)×(-47)×4×(-7)
(-37)×(-45)×(-127)
(-8)×4×(-12)×
(-0.75) 4×(-96)×(-0.25)×481 (47-118+143)×
56 (56―34―79)×
36 (-34)×(8-43-0.4)
(-66)×〔12122-(-13)
+(-115)〕25×34-(-25)×12+25×14 (-36)×(49+56-127) (187+34-56+79)×72 13×(2143-27)×(-85)×
(-165) 3÷(-67)×(-79) (-2467)÷(-6) 2÷(5-18)×181
113÷(-3)×(-13)
-78×
(-143)÷(-38) (34-78)÷
(-56) (92-38+34)÷(-34) -3.5 ×(16-0.5)×37÷12 -127÷(-156)×138×(-7)
65×(-13-12)÷54
57÷(-225)-57×125-53÷
4 (-1620345127)×
(-15×4) 18737(-2.4)
2÷(-37)×47÷(-517)
[1512-(114÷125+312)
]÷(-118)15×(-5)÷(-15)×
5 -(13-
211+143-27)÷(-
421)
8-(-25)÷(-5)
(-13)×(-134)×131×(-671 (-16-50+325)÷(-2) (-0.5)-(-314)+6.75-512 178-87.21+43212+531921-12.79
(-6)×(-4)+(-32)÷(-8)-3
-27-(-12)+|-112|
(-9)×(-4)+ (-60)÷12 [(-
9)-15147+218]÷(-421)
-|-3|÷10-(-15)×13 -34×
(8-213-0.04) -135×(327-165)÷212
(213-312+11718)÷(-116)×(-
7)
2×32-232
222+23+23
22-(3)3×13-13
-
122+122 0-32÷3×23
22×122÷0.83
-32×
12-332÷122
342×
(-23+1) ×0 6+22×15
23×223×
332
4×32+6
24÷(-8)-123×(-22)
524232×
(754811)×7 22-2[ -3×34]÷15
62÷9÷692
-{33130.412(2)}
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