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 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
By Iris
By 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~~
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)
=$x^{10}$ .$y^{4}$ :$y^{4}$
=$x^{10}$