6.9 Explore & Grow

A mother giraffe weighs 11 times as much as a newborn giraffe. The combined weight of the giraffes is 1,800 pounds. What is the weight of each giraffe?

UNDERSTAND: What do you know? (select 3)

NEXT STEP: PLAN

• there are 2 giraffes

• both giraffes weigh 1,800 pounds combined

• the mother giraffe weighs 11 times the weight of the newborn

• the weight of each giraffe

A mother giraffe weighs 11 times as much as a newborn giraffe. The combined weight of the giraffes is 1,800 pounds. What is the weight of each giraffe?

UNDERSTAND: What do you need to know? (select 2)

NEXT: PLAN

• how many giraffes there are

• the combined weight of both giraffes

• the weight of the mother giraffe

• the weight of the newborn giraffe

A mother giraffe weighs 11 times as much as a newborn giraffe. The combined weight of the giraffes is 1,800 pounds. What is the weight of each giraffe?

PLAN: How will you solve?

A mother giraffe weighs 11 times as much as a newborn giraffe. The combined weight of the giraffes is 1,800 pounds. What is the weight of each giraffe?

PLAN: How will you solve?

Include all steps, operations, and equations.

Answer explanation

STEP 1: Find the weight of the newborn giraffe.

HOW? Divide the combined weight of the mom & newborn (1,800) by 12, which is the sum of 11 + 1.

STEP 2: Find the weight of the mother giraffe.

HOW? Multiply the weight of the baby giraffe by 11.

• 15 pounds

• 16 pounds

• 150 pounds

• 160 pounds

A mother giraffe weighs 11 times as much as a newborn giraffe. The combined weight of the giraffes is 1,800 pounds. What is the weight of each giraffe?

STEP 2: How will you find the weight of the mother giraffe?

Answer explanation

The weight of the mother giraffe is 11 times the weight of a newborn giraffe.

The weight of the newborn giraffe = 150.

150 x 11 = weight of mother giraffe.

Now, SOLVE!

• 1,500 pounds

• 1,650 pounds

• 15,000 pounds

• 16,500 pounds

A mother giraffe weighs 11 times as much as a newborn giraffe. The combined weight of the giraffes is 1,800 pounds. What is the weight of each giraffe?

CHECK:

How will you make sure your answer makes sense?

• area model

• compare to my estimate

• partial quotients

• long division

• box method