Details

Main idea

Theme

Solution

A single substance

Two or more things combined but not chemically joined

A type of animal

A kind of plant

The numbers are equal

One number is smaller than another

One number is larger than another

The numbers are opposite

Transparent

Opaque

Mixture

Solution

The number on the bottom

The number on the top

The answer to a multiplication problem

The number in the middle

Writing numbers using only digits

Writing numbers to show the value of each digit

Writing numbers as words

Writing numbers backwards

$$\frac{2}{3}$$

$$\frac{1}{4}$$

$$\frac{3}{4}$$

$$\frac{2}{5}$$

Using up all resources

Protecting and saving resources

Mixing chemicals

Building a fort

4,200

Four thousand, two hundred

$$4 \times 1000 + 2 \times 100$$

42

$$>$$

$$=$$

$$<$$

$$+$$

A type of animal

A strong building used for protection

A kind of plant

A math problem

5

$$\frac{3}{4}$$

$$2 \frac{1}{2}$$

0.5

Opaque

Transparent

Mixture

Conservation

Reflection

Opaqueness

Refraction

Conservation