17.85+15.17-120 37.24+37.76+63.79+21.63 69.113-27.69+69.14+31 5.6²-18:3 5³.35+4³.7 Giúp em với ạ 30/07/2021 Bởi Iris 17.85+15.17-120 37.24+37.76+63.79+21.63 69.113-27.69+69.14+31 5.6²-18:3 5³.35+4³.7 Giúp em với ạ
17.85+15.17-120 = 17.(85+15) – 120 = 17.100 – 120 = 1700 – 120 = 1580 37.24+37.76+63.79+21.63 = 37.(24 + 76 ) + 63.(79+21 ) = 37. 100 + 63. 100 = 3700 + 6300 = 10000 69.113-27.69+69.14+31 = 63.(113-27+14) +31 = 63. 100 + 31 = 6300 + 31 = 6331 5.6²-18:3 = 5.36-6 = 180 – 6 = 174 5³.35+4³.7 = 125.35+64.7 = 125.5.7 + 64.7 = 125. 7.(5+64) = 875.70 = 61250 Chúc bạn học tốt~~ Bình luận
a)17.85+15.17-120 =17.(85+15)-120 =17.100-120 =1700-120 =1580 b)37.24+37.76+63.79+21.63 =37.(24+76)+63.(79+21) =37.100+63.100 =(37+63).100 =100.100 =10000 c)69.113-27.69+69.14+31 =69.(113-27+14)+31 =69. 100 +31 = 6900 +31 = 6931 d)5.$6^{2}$ -18:3 =5.6.6-6 =(5.6-1).6 = 29 .6 = 174 e)$5^{3}$ .35+$4^{3}$ .7 =$5^{3}$ .5.7+$4^{3}$ .7 =($5^{4}$ +$4^{3}$ ).7 = 689 .7 = 4823 g)3⁶.3²+2.81² =6561+13122 =19683 h)(6⁴.8⁴):12³ =$48^{4}$ :$12^{3}$ =3072 i)(x⁵.y²)²:y⁴(y≠0) =$x^{10}$ .$y^{4}$ :$y^{4}$ =$x^{10}$ Bình luận
17.85+15.17-120
= 17.(85+15) – 120
= 17.100 – 120
= 1700 – 120
= 1580
37.24+37.76+63.79+21.63
= 37.(24 + 76 ) + 63.(79+21 )
= 37. 100 + 63. 100
= 3700 + 6300
= 10000
69.113-27.69+69.14+31
= 63.(113-27+14) +31
= 63. 100 + 31
= 6300 + 31
= 6331
5.6²-18:3
= 5.36-6
= 180 – 6
= 174
5³.35+4³.7
= 125.35+64.7
= 125.5.7 + 64.7
= 125. 7.(5+64)
= 875.70
= 61250
Chúc bạn học tốt~~
a)17.85+15.17-120
=17.(85+15)-120
=17.100-120
=1700-120
=1580
b)37.24+37.76+63.79+21.63
=37.(24+76)+63.(79+21)
=37.100+63.100
=(37+63).100
=100.100
=10000
c)69.113-27.69+69.14+31
=69.(113-27+14)+31
=69. 100 +31
= 6900 +31
= 6931
d)5.$6^{2}$ -18:3
=5.6.6-6
=(5.6-1).6
= 29 .6
= 174
e)$5^{3}$ .35+$4^{3}$ .7
=$5^{3}$ .5.7+$4^{3}$ .7
=($5^{4}$ +$4^{3}$ ).7
= 689 .7
= 4823
g)3⁶.3²+2.81²
=6561+13122
=19683
h)(6⁴.8⁴):12³
=$48^{4}$ :$12^{3}$
=3072
i)(x⁵.y²)²:y⁴(y≠0)
=$x^{10}$ .$y^{4}$ :$y^{4}$
=$x^{10}$