I can multiply decimals and place the decimal point correctly in the product.Puedo multiplicar decimales y colocar correctamente el punto decimal en el producto.
MissionMisión · Harbor WorksPuerto de trabajo
Keep the port running.Mantén el puerto en marcha.
Welcome to Harbor Works, where every crate, rope, and tank of fuel is priced by the unit. To bill ships fairly, you multiply decimals and place the decimal point in exactly the right spot.
Bienvenido a Harbor Works, donde cada caja, cuerda y tanque de combustible se cobra por unidad. Para facturar con justicia a los barcos, multiplicas decimales y colocas el punto decimal en el lugar exacto.
Word bankBanco de palabras 5 words5 palabrasproduct, decimal point, decimal places, …producto, punto decimal, cifras decimales, …
- productproducto
- The answer when you multiply.La respuesta cuando multiplicas.
- decimal pointpunto decimal
- The dot that separates the whole-number part from the part after it.El punto que separa la parte entera de la parte que sigue.
- decimal placescifras decimales
- How many digits come after the decimal point.Cuántos dígitos hay después del punto decimal.
- estimateestimar
- Find an answer that is close by rounding first. It helps check the exact answer.Hallar una respuesta cercana redondeando primero. Ayuda a comprobar la respuesta exacta.
- place valuevalor posicional
- What a digit is worth because of where it sits in the number.Lo que vale un dígito por el lugar que ocupa en el número.
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.
- Predict the total for 8 stickers at $1.75 by multiplying 175 × 8 and placing the decimal point. Then set the model to 8 items and compare. Explain how you decided where the decimal point goes.
- A crane lifts 7.6 tonnes. What is 7.6 rounded to the nearest whole number?
- 7
- 8
- 7.5
- 76
- A rope costs $0.075 per centimeter. How many decimal places does the number 0.075 have?
- 3
- 2
- 1
- 4
- A shipping label shows a weight of 3.4 kg for each box, and a pallet holds 100 boxes. What is 3.4 × 100?
- 3.400
- 34
- 0.034
- 340
- 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.
- What is 3.4 × 2.6?
- 0.884
- 8.48
- 8.84
- 88.4
- What is 0.7 × 1.5?
- 0.105
- 1.05
- 1.50
- 10.5
- What is 5.3 × 4?
- 2.12
- 20.12
- 21.2
- 212
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.
- Match each expression to its product.
- A car travels 55.5 miles per hour for 2.4 hours. How far does it go?
- 13.32 miles
- 57.9 miles
- 133.2 miles
- 1,332 miles
- Spot the Common Mistake — Placing the Decimal Point
- What is the best next move?
- Line up the decimal points and bring the point straight down.
- Give 1,440 as the answer, since the multiplying is finished.
- Count the places in 3.2 only and use that many.
- Count the decimal places in both factors and add them.
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.
- 3.5 × $6.80 = ?
- $2.38
- $21.80
- $23.80
- $238.00
- Round to estimate: about how much should the deli meat cost?
- about $2.80
- about $14
- about $28
- about $280
- A student answered $238.00. What went wrong?
- They added instead of multiplying
- They rounded too early
- They used the wrong price
- They put the decimal point in the wrong place