Addition of Decimals
3.8 + 9 + 4.3
17.1
1.56 - 1.08
0.48
Descartes estimates a sum by rounding each number to the nearest whole number. His estimate is 120. Could he have estimated this sum?
82.7 + 37.4
Yes, 83 + 37 is 120
You ride your bike for 2.7 miles. Your friend rides her bike for 4.2 miles. How much farther did your friend ride her bike than you?
1.5 miles
Find the Sum.
24.82 + 7.93
32.75
0.84 - 0.17
0.67
Descartes estimates a sum by rounding each number to the nearest tens place. His estimate is 270. Could he have estimated this difference?
418.9 - 223.87
No, 420 - 220 is 200
Your friend buys 3.5 meters of blue ribbon, 2.25 meters of red ribbon, and 3.75 meters of white ribbon. How much ribbon does she buy in all?
9.5 meters
1123.98 + 47.65
1,171.63
8.1 - 4.3 + 2.7
6.5
Estimate 13.9 + 8.21
22
You launch a water balloon 98.75 feet. Your water balloon travels 13.16 feet shorter than your friend’s water balloon. How far does your friend’s water balloon travel?
111.91 feet
4.9 + 2.5 + 3.8
11.2
35.7 - 13.8
21.9
One cup of wild rice has 6.5 grams of protein. One cup of shredded chicken has 36.9 more grams of protein than 1 cup of wild rice. About how many grams of protein are in 1 cup of chicken?
About 44 grams
You pick an apple that weighs 73.54 grams. Your apple weighs 36.53 grams lighter than your friend’s apple. How much does your friend’s apple weigh?
110.07
2 + 18.6 - 7.9
12.7
37.82 - 5.07
32.75
Descartes estimates a sum by rounding each number to the nearest whole number. His estimate is 620. Could he have estimated this sum?
237.5 + 345.1
No, it is 583
Decarte buys a pen set for $11.99, a pad of paper for $3.50, and a pack of stickers. He pays with a $20 bill and receives $2.02 in change. How much did the stickers cost?
$2.49