Decimals
Order of Operations
Division & Multiplication
Ecosystem Experts
Mystery Mix
100

Write "five and twelve hundredths" as a decimal. 


Answer: What is 5.12?

100

In PEMDAS (Order of Operations), this is the first step you always check for.

 Answer: What are Parentheses?

100

Solve: 125 × 5. 


Answer: What is 625?

100

This ecosystem features salt and fresh water mixing. 


Answer: What is an Estuary?

100

Primary energy source for most food chains.

The Sun

200

Compare these two decimals 

using >, <, or = : 0.45 ___ 0.405. 


Answer: What is >?

200

Solve: 11+ (5 × 2) -1 


Answer: What is 20?

200

Solve: 480 ÷ 60. 

 

Answer: What is 8?

200

These organisms break down dead plants and animals. 


Answer: What are Decomposers?

200

10 less than the product of 4 and 6

 (Write the expression).

Answer: (4 x 6) - 10

300

Round 4.782 to the nearest tenth. 


Answer: What is 4.8?

300

Solve: (15 - 3) ÷ 4 + 7. 


Answer: What is 10?

300

Solve: 1,125 ÷ 25. 


Answer: What is 45?

300

An ecosystem where trees lose leaves in the fall. 


Answer: What is a Deciduous Forest?

300

Forest with trees that have needles and cones.

Coniferous forests

400

Solve: 12.5 + 3.94. 


Answer: What is 16.44?

400

Write a numerical expression for: Add 8 and 7, then multiply by 2.


Answer: What is (8 + 7) × 2?

400

Solve: 240 × 32. 


Answer: What is 7680?

400

List two abiotic factors in a pond. 


Answer: What are sunlight, stone, water, or temperature?

400

Write 3.125 in expanded form.

Answer:  3 + 0.1 + 0.02 + 0.005

500

Solve: 0.6 × 0.4. 


Answer: What is 0.24?

500

Solve: 2 × (8 + 2) ÷ 5. 


Answer: What is 4?

500

240 students are going on a trip. Each bus holds 40 students. How many buses are needed?

Answer: What is 6?

500

This ecosystem has very low rainfall. 


Answer: What is a Desert?

500

What do food chain arrows represent?

Answer: Flow of energy

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