1.
Musa is loading oxygen tanks onto a space station. He fills 8 crates, and each crate holds 6 tanks. The astronauts used 17 tanks during a spacewalk. How many oxygen tanks are left?
SHOW YOUR WORK
Answer:
Did you know? Astronauts can't breathe in space — there is no air at all. They carry oxygen tanks every time they leave the spaceship.
2.
Aisha collects glow-in-the-dark star stickers. She has 4 packs, and each pack has 9 stickers. She arranges all of them into 6 equal rows on her rocket poster. How many stickers are in each row?
SHOW YOUR WORK
Answer:
Did you know? There are more stars in the sky than grains of sand on every beach on Earth!
3.
A Moon base storage room had 235 rock samples. On Monday, astronauts took out 48 samples to study and later brought back 19 of them. How many rock samples are in the storage room now?
SHOW YOUR WORK
Answer:
Did you know? Astronauts have brought back over 800 pounds of Moon rocks for scientists to study.
4.
A rocket launch countdown show starts at 3:15. The launch and flight last 1 hour and 40 minutes. At what time does the rocket reach orbit?
SHOW YOUR WORK
Answer:
Did you know? A rocket has to go super fast — about 17,500 miles per hour — to stay in orbit around Earth.
5.
Bilal is building a model Mars rover. Each wheel section needs 7 bolts, and he has 50 bolts. How many complete wheel sections can he build, and how many bolts will be left over?
SHOW YOUR WORK
Answer:
Did you know? Real Mars rovers have 6 wheels, and each wheel has its own little motor so it can climb over rocks.
1.
Yusuf's astronaut team receives 12 boxes of solar cells to power their satellites. Each box holds 24 solar cells. They share the cells equally among 8 satellites. How many solar cells does each satellite get?
SHOW YOUR WORK
Answer:
Did you know? Satellites use solar panels to turn sunlight into electricity, since there are no power outlets in space.
2.
Zaynab saves $5 each week for 16 weeks to buy a telescope. Along the way she spends $38 on lenses and $24 on a star map. How much money does she have left?
SHOW YOUR WORK
Answer:
Did you know? The Hubble Space Telescope is the size of a school bus and has been taking pictures of space since 1990.
3.
A greenhouse on Mars has a floor that is 15 feet long and 9 feet wide. What is the area of the floor? If one bag of Martian soil covers 27 square feet, how many bags are needed to cover the whole floor?
SHOW YOUR WORK
Answer:
Did you know? Mars soil is reddish because it is full of rusty iron — that's why Mars is called the "Red Planet."
4.
On the space station, a round flatbread is cut into 8 equal slices for dinner. Three astronauts each eat 2 slices. What fraction of the flatbread did they eat in all? What fraction is left over?
SHOW YOUR WORK
Answer:
Did you know? Food floats in space! Astronauts use sticky sauces and tortillas instead of bread so crumbs don't fly everywhere.
5.
A spacecraft travels 245 miles every day on its way to a space station. How far does it travel in 6 days? If the whole journey is 1,600 miles, how many miles are left after 6 days?
SHOW YOUR WORK
Answer:
Did you know? The Moon is about 239,000 miles from Earth — it took the Apollo astronauts about 3 days to get there.
3rd Grade
1. 31 oxygen tanks.
8 crates × 6 tanks = 48 tanks. Then 48 − 17 used = 31.
2. 6 stickers in each row.
4 packs × 9 = 36 stickers. Then 36 ÷ 6 rows = 6.
3. 206 rock samples.
235 − 48 taken out = 187. Then 187 + 19 returned = 206.
4. 4:55.
3:15 + 1 hour = 4:15. Then 4:15 + 40 minutes = 4:55.
5. 7 sections, with 1 bolt left over.
50 ÷ 7 = 7 remainder 1. He builds 7 full sections, 1 bolt left.
4th Grade
1. 36 solar cells per satellite.
12 boxes × 24 = 288 cells. Then 288 ÷ 8 satellites = 36.
2. $18 left.
$5 × 16 weeks = $80 saved. Then $80 − $38 − $24 = $18.
3. Area = 135 sq ft; 5 bags of soil.
15 × 9 = 135 square feet. Then 135 ÷ 27 = 5 bags.
4. They ate 6/8 (= 3/4); 2/8 (= 1/4) is left.
3 astronauts × 2 slices = 6 slices eaten = 6/8 = 3/4. Left: 8 − 6 = 2 slices = 2/8 = 1/4.
5. 1,470 miles in 6 days; 130 miles left.
245 × 6 = 1,470 miles. Then 1,600 − 1,470 = 130 miles remaining.