Adding Decimals
When adding decimals, what is the first step you should do as you are writing the numbers vertically?
Line up the decimal places!
When subtracting decimals, what is the first step you should do as you are writing the numbers vertically?
Line up the decimal point!
What is the first step in multiplying decimals?
Multiply as you would with whole numbers
It rained 0.43 inches on Saturday and 0.95 inches on Sunday. How much did it rain on Saturday and Sunday combined?
1.38
Ms. Muntaz went to the candy shop. She bought 7 snicker bars for $0.99 each. How much money did she spend?
$6.93
What is the second step in adding decimals?
Placeholder zeros
________ means to rearrange groups in place value to carry out an operation like subtraction (and addition)
regrouping
How do we determine how many decimal places our product has?
Count the amount of decimal places in our factors
A carpenter bought a piece of wood that was 7.2 meters long. Then she sawed 5.7 meters off the end. How long is the piece of wood now?
1.5
Gabriel wants some new games for his phone. Each game costs $2.99. How much would it cost if he bought 7 new games? Put your answer in terms of money
$20.93
Does order matter in addition?
No
Does order matter in subtraction?
Yes
Does order matter in multiplication?
No
Sandeep mixed 0.55 grams of salt into a pot of soup she was cooking. Before she served the soup, Sandeep added 0.81 grams of salt. How much salt did Sandeep put into the soup in all?
1.36
Sara wants to get 2.5 pounds of guava that sell for $3.67 a pound. How much does Sara spend on guava? Put your answer in terms of money!
$9.18
3.45 + 0.6 =
4.05
5.3 - 0.6 =
4.7
5.3 x 0.6 =
3.18
It snowed 0.72 inches on Monday and 0.45 inches on Tuesday. How much did it snow on Monday and Tuesday combined?
1.17
Aden is a dairy farmer. His favorite cow, Annabelle, produces 7 gallons of milk per day. One gallon of milk weighs 8.6 pounds. How many pounds of milk does Annabelle produce each day?
60.2
7.8632 + 0.6296 =
8.4928
67.89 - 0.598 =
67.292
16.33 x 4.321 =
70.56193
Radha bought 6.92 yards of striped fabric and 2.94 yards of floral fabric. How many more yards of striped fabric than floral fabric did Radha buy?
3.98
Jordan is making gingerbread cookies and lemon bars for a holiday party. He needs 2.5 times as much sugar for the bars as he needs for the cookies. If his gingerbread cookie recipe calls for 1.5 cups of sugar, how much sugar does Jordan need for the lemon bars?
3.75