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式の加法・減法3 途中式

1.
0.2x+(x-0.5) 2x-(34x-2) 35a+(110a-23b) 0.02a2-(0.05a2-1.03a)
2.
(3x+1)+(12x-13) (103a+4b)+(5a-92) (x-2512)-(34x-2) (1.7a2-2)+(2a2-1.9) (0.05xy+0.01)-(0.02xy-0.03) (14x-2y)-(43x-74y) (54x2-72x)+(32x2+x)-(56x2-29x) (73a-b)-(2a+196c)-(34b-3c)
3.
(34x+y+12)+(73x-3) (53a+37b-c)-(c-117b) (x2-58y2)+(x2+512y2-2) (14a-59b)-(23a-34b-211c) (98x2+75x)+(158x2-125x-16) (79ab-125a-1615b)-(1118ab-935a-1112b)

1.

0.2x+(x-0.5)
=0.2x+x-0.5
=(0.2+1)x-0.5
=1.2x-0.5

2x-(34x-2)
=2x-34x+2
=(2-34)x+2
=54x+2

35a+(110a-23b)
=35a+110a-23b
=(35+110)a-23b
=710a-23b

0.02a2-(0.05a2-1.03a)
=0.02a2-0.05a2+1.03a
=(0.02-0.05)a2+1.03a
=-0.03a2+1.03a


2.

(3x+1)+(12x-13)
=3x+1+12x-13
=3x+12x+1-13
=(3+12)x+23
=72x+23

(103a+4b)+(5a-92)
=103a+4b+5a-92
=103a+5a+4b-92
=(103+5)a+4b-92
=253a+4b-92

(x-2512)-(34x-2)
=x-2512-34x+2
=x-34x-2512+2
=(1-34)x-112
=14x-112

(1.7a2-2)+(2a2-1.9)
=1.7a2-2+2a2-1.9
=1.7a2+2a2-2-1.9
=(1.7+2)a2-3.9
=3.7a2-3.9

(0.05xy+0.01)-(0.02xy-0.03)
=0.05xy+0.01-0.02xy+0.03
=0.05xy-0.02xy+0.01+0.03
=(0.05-0.02)xy+0.04
=0.03xy+0.04

(14x-2y)-(43x-74y)
=14x-2y-43x+74y
=14x-43x-2y+74y
=(14-43)x+(-2+74)y
=-1312x-14y

(54x2-72x)+(32x2+x)-(56x2-29x)
=54x2-72x+32x2+x-56x2+29x
=54x2+32x2-56x2-72x+x+29x
=(54+32-56)x2+(-72+1+29)x
=15+18-1012x2+-63+18+418x
=2312x2-4118x

(73a-b)-(2a+196c)-(34b-3c)
=73a-b-2a-196c-34b+3c
=73a-2a-b-34b-196c+3c
=(73-2)a+(-1-34)b+(-196+3)c
=13a-74b-16c


3.

(34x+y+12)+(73x-3)
=34x+y+12+73x-3
=34x+73x+y+12-3
=(34+73)x+y-52
=3712x+y-52


(53a+37b-c)-(c-117b)
=53a+37b-c-c+117b
=53a+37b+117b-c-c
=53a+(37+117)b+(-1-1)c
=53a+2b-2c


(x2-58y2)+(x2+512y2-2)
=x2-58y2+x2+512y2-2
=x2+x2-58y2+512y2-2
=(1+1)x2+(-58+512)y2-2
=2x2-524y2-2


(14a-59b)-(23a-34b-211c)
=14a-59b-23a+34b+211c
=14a-23a-59b+34b+211c
=(14-23)a+(-59+34)b+211c
=3-812a+-20+2736b+211c
=-512a+736b+211c


(98x2+75x)+(158x2-125x-16)
=98x2+75x+158x2-125x-16
=98x2+158x2+75x-125x-16
=(98+158)x2+(75-125)x-16
=3x2-x-16


(79ab-125a-1615b)-(1118ab-935a-1112b)
=79ab-125a-1615b-1118ab+935a+1112b
=79ab-1118ab-125a+935a-1615b+1112b
=(79-1118)ab+(-125+935)a+(-1615+1112)b
=14-1118ab+-84+935a+-64+5560b
=16ab-157a-320b

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