Decimal Operations and Problem Solving

Mr. Richards reviews grade 6 practice problems on adding and subtracting decimals. The lesson covers aligning decimal points, using placeholders, and unbundling for subtraction. It includes examples of finding differences, comparing weights, completing calculations, and understanding ratios. The video also demonstrates volume calculation for cube-shaped containers.

What is the first step in solving a subtraction problem involving decimals?

• Add zeros to the end

• Multiply the numbers

• Align the decimal points

• Subtract from left to right

When subtracting 7.2 from 3.67, which placeholder is used?

• 1

• 0

• 9

• 5

How do you determine if the chocolates are heavier or lighter than the labeled weight?

• By adding the weights

• By multiplying the weights

• By dividing the weights

• By comparing the decimal values

What is the result of subtracting 3798 ten-thousandths from 3840 ten-thousandths?

• 52 ten-thousandths

• 32 ten-thousandths

• 62 ten-thousandths

• 42 ten-thousandths

What is the key to completing a decimal addition problem correctly?

• Ignoring the decimal points

• Carrying over numbers correctly

• Multiplying the numbers

• Subtracting instead of adding

How do you get from 8 to 0 in a decimal addition problem?

• Add 2

• Add 4

• Add 6

• Add 8

How many smaller cubes with side lengths of 2.5 feet fit into a larger cube with side lengths of 10 feet?

• 64

• 32

• 128

• 16

If a chef prepares 2 loaves of bread for every 9 customers, how many loaves are needed for 63 customers?

• 12

• 18

• 14

• 16

What is the ratio of loaves to customers if the chef prepares 20 loaves?

• 1:9

• 1:4

• 1:5

• 1:6

How much of a loaf is prepared for each customer?

• 1/3

• 1/4

• 2/9

• 1/2