Question

in 6 and 7, use the table at the right.

1. © mp.4 model with math how many points were scored by howie and theo? estimate by rounding to the nearest hundred. then solve. write an equation that represents the problem.
2. © mp.1 make sense and persevere is your answer to exercise 6 reasonable? explain.
3. az vocabulary maria and her family drove 885 miles on their summer vacation. the first 8 on the left in this number has a _ of 800.
4. © mp.3 critique reasoning marc thinks a hexagon has 5 sides and 5 angles. is marc correct? explain.
5. higher order thinking sarah and angela have a collection of pennies and nickels in their piggy banks. which girl has more coins in her bank? explain how you know using numbers and symbols.
6. there were 252 horses in the pasture. the rancher added 163 new horses to the pasture. complete the problem to find how many horses are now in the pasture. show regrouping, if needed.

252
+ 163
____

1. mrs. collins bought a $256 plane ticket in march and a $125 ticket in april. complete the problem to find how mrs. collins spent on plane tickets. regrouping, if needed.

$256
+ $125
____

Explanation:

6.

Step1: Redondear los números

Redondeamos 272 a 300 (ya que 72 > 50) y 325 a 300 (ya que 25 < 50).

Step2: Calcular la estimación

Sumamos las estimaciones: 300 + 300 = 600.

Step3: Calcular la suma exacta

Escribimos la ecuación: 272+325 = 597.

La respuesta de 597 es razonable porque la estimación fue de 600. La diferencia entre la estimación y la respuesta exacta es pequeña (600 - 597=3), lo que significa que el redondeo no distorsionó demasiado el resultado.

El primer 8 en 885 está en la centena, y su valor es 800. El término que se usa para el valor de un dígito en un número de acuerdo a su posición es "valor posicional".

Answer:

La estimación es 600 y la suma exacta es 597.

7.