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