I can write inequalities to represent real-world situations.Puedo escribir desigualdades para representar situaciones de la vida real.
MissionMisión · Harbor WorksPuerto de trabajo
Keep the port running.Mantén el puerto en marcha.
Welcome to Harbor Works. Every crane, ferry and loading dock has a limit posted on a sign. Write each rule as an inequality so the port stays safe and keeps running.
Te damos la bienvenida al puerto de trabajo. Cada grúa, ferri y muelle de carga tiene un límite en un letrero. Escribe cada regla como una desigualdad para que el puerto sea seguro y siga funcionando.
Word bankBanco de palabras 4 words4 palabrasinequality, at least / at most, constraint, …desigualdad, al menos / a lo más, restricción, …
- inequalitydesigualdad
- A math sentence that compares two sides with <, >, ≤ or ≥.Una oración matemática que compara dos lados con <, >, ≤ o ≥.
- at least / at mostal menos / a lo más
- 'At least' means ≥ (this number or more). 'At most' means ≤ (this number or less).«Al menos» significa ≥ (este número o más). «A lo más» significa ≤ (este número o menos).
- constraintrestricción
- A limit that a solution must follow, like a weight limit.Un límite que una solución debe cumplir, como un límite de peso.
- solution setconjunto solución
- All the values that make an inequality true.Todos los valores que hacen verdadera una desigualdad.
Stage 1 of 5Etapa 1 de 5
Get ReadyPrepárate
Wake up what you know, then explore today's model.
Activa lo que sabes y luego explora el modelo de hoy.
- Compare 'at least 20 points' with 'more than 20 points'. Predict whether a player with exactly 20 points gets in for each sign. Write both inequalities, test the number 20 in each, and explain why the symbols are different.
- Which comparison is true?
- 8 > 13
- 4.5 < 4.05
- 6 < 6.5
- 0.3 > 0.30
- How many whole numbers are greater than 3 and less than 8?
- Tap the greatest whole number that is less than 7.
- 1 fresh problem with new numbers each time (interactive only).
Stage 2 of 5Etapa 2 de 5
Try ItInténtalo
Use the hints when you need them. Every wrong answer tells you why.
Usa las pistas cuando las necesites. Cada respuesta incorrecta te dice por qué.
- Which inequality represents: 'The temperature is less than 40 degrees'?
- t < 40
- t > 40
- t ≤ 40
- t = 40
- Which inequality represents: 'You must be at least 48 inches tall to ride'?
- h ≥ 48
- h > 48
- h < 48
- h ≤ 48
- Which inequality represents: 'A store can hold no more than 75 people'?
- p ≤ 75
- p < 75
- p ≥ 75
- p > 75
Stage 3 of 5Etapa 3 de 5
On Your OwnPor tu cuenta
Tables, mistakes to find, and problems with a few steps.
Tablas, errores por encontrar y problemas de varios pasos.
- Sort each inequality into whether x = 10 is a solution.
- A parking garage charges if your stay is more than 2 hours. Which inequality represents times t that are charged?
- t > 2
- t ≥ 2
- t < 2
- t ≤ 2
- Crack the Inequality Error
- What is the best next move?
- Write h = 48.
- Write h > 48.
- Write h < 48.
- Write h ≤ 48.
Stage 4 of 5Etapa 4 de 5 · OptionalOpcional
Practice MorePractica más
Optional extra practice. Press New numbers for another problem on the same skill.
Práctica extra opcional. Toca Números nuevos para otro problema de la misma habilidad.
- 5 fresh problems with new numbers each time (interactive only).
Stage 5 of 5Etapa 5 de 5
Show What You KnowDemuestra lo que sabes
Show what you learned today. Take your time; you can try again.
Muestra lo que aprendiste hoy. Tómate tu tiempo; puedes intentarlo otra vez.
- Which speed is NOT possible for the getaway car?
- 45 mph
- 60 mph
- 65 mph
- 70 mph
- Does s ≤ 65 include 65 itself?
- No — it must be strictly less
- Yes — the 'or equal to' part includes 65
- Only if the car stops
- Only on a highway
- Which inequality means 'at most 65'?
- s ≤ 65
- s < 65
- s ≥ 65
- s > 65