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29+29+......+29+83+...+83
=29.17+83.29
=29(17+83)
=29.100
=2900
tick bạn

a,(-17)+(-83)+2017+53
= -100+2017+53
=1917+53
=1970
b,(-64)+(-12)+(-36)
= -76+(-36)
=-112
c,27.152-22.27+73.130
= 27.(152-22)+73.130
=27.130+73.130
=130.(27+73)
=130.100
=13000
A) (-17)+ (-83)+ 2017+53
=(-17)+ 2017+(-83)+53
=2000+ 30
=2030
B) (-64)+(-12)+(-36)
= -76+(-36)
=-103
C) 27. 152- 22. 27+ 73. 130
=27.(152-22+73). 130
=27. 203. 130
= 5481. 130
= 712530

1) \(\left(+15\right)+\left(+17\right)=15+17=32\)
2) \(\left(-3\right)+\left(-7\right)=-3-7=-\left(3+7\right)=-10\)
3) \(\left(-25\right)+\left(+4\right)=-25+4=-\left(25-4\right)=-21\)
4) \(\left(-6\right)+\left(-54\right)=-6-54=-\left(6+54\right)=-60\)
5) \(\left(-15\right)+20=20-15=5\)
6) \(\left(-5\right)+8+7+5\)
\(=\left(-5+5\right)+\left(8+7\right)\)
\(=15\)
7) \(\left(-8\right)+\left(-11\right)+\left(-2\right)\)
\(=\left[\left(-8\right)+\left(-2\right)\right]+\left(-11\right)\)
\(=\left(-10\right)+\left(-11\right)\)
\(=-21\)
8) \(15+\left(-5\right)+\left(-14\right)+\left(-16\right)\)
\(=\left[15+\left(-5\right)\right]+\left[\left(-14\right)+\left(-16\right)\right]\)
\(=10+\left(-30\right)\)
\(=-20\)
9) \(\left(-20\right)+\left(-14\right)+3+\left(-86\right)\)
\(=\left[\left(-20\right)+3\right]+\left[\left(-14\right)+\left(-86\right)\right]\)
\(=\left(-17\right)+\left(-100\right)\)
\(=-117\)
10) \(\left(-136\right)+123+\left(-264\right)+\left(-83\right)+240\)
\(=\left[\left(-136\right)+\left(-264\right)\right]+\left[123+\left(-83\right)\right]+240\)
\(=\left(-400\right)+40+240\)
\(=\left(-360\right)+240\)
\(=-120\)
11) \(\left(-596\right)+2001+1999+\left(-404+189\right)\)
\(=\left(-596\right)+2001+1999-404+189\)
\(=\left[\left(-596\right)-404\right]+\left(2001+189\right)+1999\)
\(=\left(-1000\right)+2190+1999\)
\(=1190+1999\)
\(=3189\)
12) \(314+\left(-153\right)+64+121+\left(-247\right)+218\)
\(=\left(314+64+121\right)+\left[\left(-153\right)+\left(-247\right)\right]+218\)
\(=\left(378+121\right)+\left(-400\right)+218\)
\(=499-400+218\)
\(=99+218\)
\(=317\)
\(\text{#}Toru\)

[54.(46+49)]-[46.(54-49)]
=[54.46+54.49]-[54.46-46.49]
=54.46+54.49-54.46+46.49
=54.46-54.46+54.49+46.49
=54.49+46.49
=49.(54+46)
=49.100
=4900
Chúc bn học tốt
\(54\times\left(46+49\right)-46\times\left(54-49\right)\)
\(=54\times46+54\times49-46\times54+46\times49\)
\(=\left(54\times46-46\times54\right)+49\times\left(54+46\right)\)
\(=49\times100\)
\(=4900\)

A=17x32+64x83+36x83+68x17
A=17x32+17x68+64x83+36x83
A=17x(32+68)+83x(64+36)
A=17x100+83x100
A=100x(83+17)
A=100x100
A=10000