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ESCOLA SECUNDÁRIA PADRE ANTÓNIO MACEDO
Ano Lectivo 2006/07 7º Ano Matemática
Turma : A Data:27/06/13
As Professoras: Alice Avó e Albina Tiago
A idade do Xavier
1. Daqui a uma década a idade do Xavier triplica. Qual é a idade do Xavier?
Para ajudar a resolver este problema abre o ficheiro equações.gsp e clica no
botão .
1.1. Regista aqui o que aparece no ecran:
idade do Xavier ……… a uma década = ……… da idade "actual" do Xavier
1.2. Clica no botão e regista a equação resultante após clicar no botão
:
A circunferência
1. Numa circunferência, o diâmetro mede 14 cm. Quanto mede o raio?
1.1. Abre o separador
1.2. Para tentar equacionar o problema clica no botão
1.3. Antes de carregar no botão consegues escrever a equação que
traduz o problema?
1.4. Segue as restantes instruções do ecrã e dá a resposta ao problema.
O Prejuízo da empresa
2. O prejuízo de uma empresa triplicou durante um ano e no final do ano
havia um saldo negativo de 51 000 euros. Qual era o prejuízo no inicio do
ano?
TIPO ax = b
continuar
equação
2.1. Para tentar equacionar o problema clica no botão
2.2. Antes de carregar no botão consegues escrever a equação que
traduz o problema?
2.3. Segue as restantes instruções do ecrã e dá a resposta ao problema.
O 19
3. Abre o separador
3.1. Qual o número que deves somar a x para obteres 19?
3.2. Segue as instruções do ecrã e completa a tabela :
Valor de x Valor de a x + a =
8,74 10,26
19
3.3. Resolve a equação x + 6,53 = 19.
equação
TIPO x + a = 19
EH EH
10,1 !
4. Abre o separador
4.1. Qual o número que deves somar a x para obteres 10,1?
4.2. Segue as instruções do ecrã e completa a tabela :
Valor de x Valor de a x - a =
13,94 3,84
10,1
4.3. Resolve a equação x – 2,35 = 10,1
TIPO x - a = 10,1

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Equações do 1º grau 7º ano

  • 1. ESCOLA SECUNDÁRIA PADRE ANTÓNIO MACEDO Ano Lectivo 2006/07 7º Ano Matemática Turma : A Data:27/06/13 As Professoras: Alice Avó e Albina Tiago A idade do Xavier 1. Daqui a uma década a idade do Xavier triplica. Qual é a idade do Xavier? Para ajudar a resolver este problema abre o ficheiro equações.gsp e clica no botão . 1.1. Regista aqui o que aparece no ecran: idade do Xavier ……… a uma década = ……… da idade "actual" do Xavier 1.2. Clica no botão e regista a equação resultante após clicar no botão :
  • 2. A circunferência 1. Numa circunferência, o diâmetro mede 14 cm. Quanto mede o raio? 1.1. Abre o separador 1.2. Para tentar equacionar o problema clica no botão 1.3. Antes de carregar no botão consegues escrever a equação que traduz o problema? 1.4. Segue as restantes instruções do ecrã e dá a resposta ao problema. O Prejuízo da empresa 2. O prejuízo de uma empresa triplicou durante um ano e no final do ano havia um saldo negativo de 51 000 euros. Qual era o prejuízo no inicio do ano? TIPO ax = b continuar equação
  • 3. 2.1. Para tentar equacionar o problema clica no botão 2.2. Antes de carregar no botão consegues escrever a equação que traduz o problema? 2.3. Segue as restantes instruções do ecrã e dá a resposta ao problema. O 19 3. Abre o separador 3.1. Qual o número que deves somar a x para obteres 19? 3.2. Segue as instruções do ecrã e completa a tabela : Valor de x Valor de a x + a = 8,74 10,26 19 3.3. Resolve a equação x + 6,53 = 19. equação TIPO x + a = 19 EH EH 10,1 !
  • 4. 4. Abre o separador 4.1. Qual o número que deves somar a x para obteres 10,1? 4.2. Segue as instruções do ecrã e completa a tabela : Valor de x Valor de a x - a = 13,94 3,84 10,1 4.3. Resolve a equação x – 2,35 = 10,1 TIPO x - a = 10,1