Resposta:
Explicação passo-a-passo:
a) 2014
- 4000 = - 4 \times {10}^{3}−4000=−4×10
3
229000 = 229 \times {10}^{3} = 2.29 \times {10}^{5}229000=229×10
3
=2.29×10
5
225000 = 225 \times {10}^{3} = 2.25 \times {10}^{5}225000=225×10
3
=2.25×10
5
2015
20000 = 2 \times {10}^{4}20000=2×10
4
171000 = 171 \times {10}^{3} = 1.71 \times {10}^{5}171000=171×10
3
=1.71×10
5
19100 = 191 \times {10}^{3} = 1.91 \times {10}^{5}19100=191×10
3
=1.91×10
5
2016
48000 = 48 \times \times {10}^{3} = 4.8 \times {10}^{4}48000=48××10
3
=4.8×10
4
137000 = 137 \times {10}^{3} = 1.37 \times {10}^{5}137000=137×10
3
=1.37×10
5
185000 = 185 \times {10}^{3} = 1.85 \times {10}^{5}185000=185×10
3
=1.85×10
5
b)
2014
225000 - 229000 = - 4000225000−229000=−4000
Logo, confere.
2015
191000 - 171000 = 20000191000−171000=20000
Logo também confere.
2016
185000 - 137000 = 48000185000−137000=48000
Também confere
c) Exportações :
\frac{225 \times {10}^{3} + 191 \times {10}^{3} + 185 \times {10}^{3} }{3}
3
225×10
3
+191×10
3
+185×10
3
\frac{601 \times {10}^{3}}{3}
3
601×10
3
Aproximadamente200.333 \times {10}^{3} = 200333200.333×10
3
=200333
Importações:
\frac{229 \times {10}^{3} + 171 \times {10}^{3} + 137 \times {10}^{3} }{3}
3
229×10
3
+171×10
3
+137×10
3
\frac{537 \times {10}^{3} }{3}
3
537×10
3
179x {10}^{3} = 179000179x10
3
=179000
Salda da balança:
\frac{ - 4 \times {10}^{3} + 20 \times {10}^{3} + 48 \times {10}^{3} }{3}
3
−4×10
3
+20×10
3
+48×10
3
\frac{64 \times {10}^{3} }{3}
3
64×10
3
Aproximadamente
21.333\times {10}^{3} = 2133321.333×10
3
=21333
