Adding
.05 + .02
.07
1.4 - .2
1.2
0.5 - 0.40
0.1
Jax is .5 in taller than Mo. Mo is 46 inches tall. How tall is Jax?
Jax is 46.5 inches tall.
True or False: When subtracting numbers with decimals, you need to line up the decimals, but when you are adding, you don't.
FALSE
.021 + .138
.159
15.6 - 14
1.6
72 + 0.3
72.3
Stella bought 3.4 lbs of chicken. Maris bought 5.03 lbs of chicken. How much chicken did they buy together?
They bought 8.43 lbs together.
When adding or subtracting decimals with different numbers of places, it is ok to put zeroes on the end to make the places the same.
TRUE
.6 + .5
1.1
1.2 - .70
.5
12 - 0.5
11.5
Toby saved $5.87. Joaquin saved $1.25 more than Toby. How much money did they save in total?
Together they saved $12.99.
When subtracting numbers with decimals, the number with the larger value needs to be on the top.
TRUE
1.52 + 3.4
4.92
2 - .77
1.23
.26 - .259
.001
Janie weighs 139.25 lbs. Carolina weighs the same as Janie. Kioto weighs .77 less than Carolina. How much do the three women weigh altogether?
They weigh 416.98 lbs altogether.
True or False: This is solvable: 2.095 - 5
FALSE
.804 + 2.16
2.964
3.004 - 0.9
2.104
9.999 + 1.88
11.879
Suheil raised $420.65 for charity. Bobbi raised $16.88 more than Suheil. Joanina raised $5.25 less than Suheil. How much money was raised for charity?
Altogether they raised $1273.58.
Why is it important to keep the decimal points lined up when adding and subtracting?
Because if you don't you will mix up what is supposed to be added or subtracted. For example, you might accidentally add a number in the tenths place with a number in the hundredths place. You can't do that because you won't get an accurate answer that makes sense.