Adding, subtracting, multiplying, and dividing decimals

Line up place values for adding and subtracting; count decimal places when multiplying; shift the point when dividing.

Standards:6.NS.B.3

Try it: three questions

Real questions from the practice bank. Tap an answer to check it.

Question 1 of 3

A recipe calls for 2.5 cups of flour. Maya has already used 0.8 cups. How many cups of flour does she still need?

Question 2 of 3

Maya buys a notebook for $3.50 and a pen for $1.25. She pays with a $10 bill. How much change does she get?

Question 3 of 3

A baker uses 2.5 kg of flour on Monday and 1.8 kg on Tuesday. On Wednesday, she uses half of the total from the first two days. How much flour does she use on Wednesday?

How this fits in

Adding, subtracting, multiplying, and dividing decimals is one skill in the Fractions & Decimals unit. Students read the unit lesson, then earn a bronze, silver, or gold medal on their last 10 answers. Medals never go down. A mastered unit comes back for review after 1, 3, 7, 16, and 35 days so it stays learned.

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