True or False
When adding and subtracting decimals, you always line up the decimal points.
True
3.14 + 5.12 =
What is 8.26?
20.8 - 7.34=
What is 13.46?
12.46 + 3.8=
16.26
Herbert bought two plants. One plant was $7.99. The other plant was $12.99. How much did he spend altogether?
Herbert spent $20.98.
When adding and subtracting decimals, you always put the longer number on top.
False
14.73+15.1=
34.63 - 27.9=
What is 6.73?
4.5 - 3.79=
What is 0.71?
Janet gave the cashier $20. Her purchase total came to $14.75. How much change will she receive?
What is $5.25?
When adding and subtracting decimals, you ignore the decimal points.
False
3 + 4.55=
What is 7.55?
150- 0.48=
What is 149.52?
79.38 - 9.19=
What is 70.19?
Jackson and his family went to the concession stand. He had $5 in his pocket. He offered to pay. He ordered a soda for $1.25. His brother ordered an ice cream for $1.50. His mom ordered a bottled water for $1.00. How much money will Jackson have leftover?
Jackson will have $1.25 remaining.
When subtracting decimals, you always put the first number on top.
True
17.82 + 3.66=
What is 21.48?
6 - 2.33=
What is 3.67?
12.13 + .9=
What is 13.03?
Sarah went to the store to buy pet food. She spent $17.95 on dog food, $13.95 on cat food, and $5.75 on hamster food. How much did she spend altogether?
Sarah spent $37.65.
When subtracting within a place value position, you can subtract whichever digit is smaller, even when it's in the top number.
False! (You must ALWAYS start with the top digit, even if you have to regroup.)
11.7 + 2.81=
What is 14.51?
1124.09 - 567.87=
What is 556.22?
10.21 - 5.6=
What is 4.61?
Joe went to the county fair with his wife and kids. They rode rides, played games, and then decided to have some fair food! Joe wanted a pretzel for $4.75. His wife wanted a snow cone for $3.50. His son wanted an over-sized lollipop for $2.50. His daughter wanted cotton candy for $4.00. He gave the cashier a $20 bill. How much change did he receive?
Joe received $5.25 in change.