Decimal Points in Products

Warmup

Activity #1

Division or Multiplication by the Reciprocal?

  • Below are two sets of problems. First solve the problems labeled A, and then solve the problems labeled B. Then compare your results.

  • Use your work in the previous problems to find each of the following. Explain your reasoning.

(a.) 720 · (0.1)

(b.) 720 · (0.01)

  • Find each product below. Show your reasoning.

(a.) 36 · (0.1)

(b.) 24.5 · (0.1)

(c.) 1.8 · (0.1)

(d.) 54 · (0.01)

(e.) (9.2) · (0.01)

Activity #2

Multiply two Decimal Numbers.

  • Check the numbers 1 through 6 one at a time to see the steps in multiplying decimal numbers.​

  • Answer the following questions;

(1.) Find the value of each product below by following the six steps outlined in the applet above.

(a.) (0.3) · (0.02)

(b.) (0.7) · (0.05)

(2.) Calculate the value of each expression below by writing the decimal factors as fractions, then writing their product as a decimal.

(a.) (0.01) · (0.02)

(b.) (0.3) · (0.2)

(c.) (1.2) · 5

(d.) (0.9) · (1.1)

(e.) (1.5) · 2

Activity #3

Multiply a Whole Number by a Decimal.

  • Start by checking the box in Step 1
  • Read the statement and check the Show Me box​.
  • Continue to check the boxes through Step 3​
  • Read through the final statement in green.
  • Use the slider to increase the number of decimal places.
  • Click to keep practicing.
  • Use the slider to increase the number of decimal places.

Challenge #1

Solve the following problems and choose the correct answer.

Challenge #2

Which expression has the same value as (0.06)·(0.154)?

Challenge #3

Quiz Time

https://www.ixl.com/math/grade-6/multiply-two-decimals-where-does-the-decimal-point-go