Tính:
14−5+7=…
22+48−34=…
8+6−9=…
82−37+25=…
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1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+22+23+24+25+26+27+28+29+30+31+32+33+34+35+36+37+38+39+40+41+42+43+44+45+46+47+48+49+50=1275
\(2575+37-2576-29\)
\(=2612-2576-29\)
\(=36-29=7\)'
\(35+35+36+37-14-15-16-17\)
\(=70+\left(36-16\right)+\left(37-17\right)-14-15\)
\(=70+20+20-14-15\)
\(=90+6-15\)
\(=96-15=81\)
\(13\cdot\left(-12\right)+87.\left(-12\right)\)
\(=\left(-12\right)\cdot\left(13+87\right)\)
\(=\left(-12\right)\cdot100=-1200\)
\(26\cdot17+17\cdot74\)
\(=\left(26+74\right)\cdot17\)
\(=100\cdot17=1700\)
\(25\cdot\left(-18\right)+25\left(-82\right)\)
\(=25\cdot\left[\left(-18\right)+\left(-82\right)\right]\)
\(=25\cdot\left(-100\right)=\left(-2500\right)\)
\(25+37-48-25-37\)
\(=\left(25-25\right)+\left(37-37\right)-48\)
\(=0+0-48\)
\(=0-48=\left(-48\right)\)
\(\left(-16\right)+24+16-34\)
\(=\left[\left(-16\right)+16\right]+\left(24-34\right)\)
\(=0+\left(-10\right)=\left(-10\right)\)
/ (-37) +14+ 26 + 37
= (-37+37) + 14 + 26
= 0 + 14 + 26
= 40
2/ (-24) + 6 + 10+24
= (-24+24) + 6 +10
= 0 + 6 + 10
= 16
3/ 15+23+(-25) + (-23)
= (23-23) + 15 - 25
= 0 + 15 - 25
= -10
4/ 60+33+ (-50) +(-33)
= (33-33) + 60 -50
= 0 + 60 - 50
= 10
5/ (-16) + (-209) + (-14) + 209
= (-209+209) - 16 - 14
= 0 - 16 - 14
= -30
6/ (-12) + (-13) +36 + (-11)
= (-12-13-11) + 36
= -36 + 36
= 0
7/ -16+ 24 + 16-34
= (-16+16) + 24 - 34
= 0 + 24 - 34
= -10
8/ 25+37-48-25-37
= (37-37) + (25-25) - 48
= 0 + 0 - 48
= -48
9/2575+37-2576-29
= (2575-2576) + 37 - 29
= -1 + 37 - 29
= -1- 29 + 37
= -30 + 37
= 7
10/34 +35+36 +37-14-15- 16-17
= (34 - 14) + (35 - 15) + (36 - 16) + (37 - 17)
= 20 + 20 + 20 + 20
= 20 . 4
= 80
1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+22+23+24+25+26+27+28+29+30+31+32+33+34+35+36+37
=(1+37)x37:2
=703
14 – 5 + 7 = 9 + 7 = 16
22 + 48 – 34 = 70 – 34 = 36
8 + 6 – 9 = 14 – 9 = 5
82 – 37 + 25 = 45 + 25 = 70.