Adding Fractions
Subtracting Fractions
Adding mixed numbers
Subtracting mixed numbers
Riddles
100

Adding Fractions

3/10 + 4/10

7/10

100

Subtracting Fractions

5/6 - 1/6 

4/6

100

Adding Mixed Numbers

2_3/4 + 2/3

2_17/12 or 3_5/12

100

Subtracting Mixed Numbers

5_3/4 - 4_1/6

1_5/24

100

I jump when I walk, but sit when I stand. What am I?

A kangaroo

200

Adding Fractions

2/3 + 1/4

11/12

200

Subtracting Fractions

3/4 - 3/8

3/8 or 12/32

200

Adding Mixed Numbers

3_2/3 + 3_2/5

6_16/15 or 7_1/15

200

Subtracting Mixed Numbers

8_2/3 - 3_4/5

4_13/15

200

What has a foot but no legs?

A ruler

300

Adding Fractions 

1/2 + 6/20

16/20 or 32/40

300

Subtracting Fractions

2/3 - 1/4

5/12

300

Adding Mixed Numbers

4_5/8 + 2_2/3

6_31/24 or 7_7/24

300

Subtracting Mixed Numbers

6_2/3 - 3_3/4

2_13/20

300

What has cities but no houses, forests but no trees, and rivers but no water?

A map

400

Adding Fractions

6/7 + 4/5

58/35 or 1_23/35

400

Subtracting Fractions

1/2 - 1/4

1/4 or 2/8

400

Adding Mixed Numbers

5_3/4 + 2_3/5

7_27/20 or 8_7/20

400

Subtracting Mixed Numbers

9_3/8 - 3_2/3

5_17/24

400

What is full of holes but still holds water?

A sponge

500

Adding Fractions

9/12 + 5/6

19/12 or 114/72 or 1_7/12 or 1_28/72

500

Subtracting Fractions

3/4 - 3/5

3/20

500

Adding Mixed Numbers

3_5/6 + 2_7/8

5_82/48 or 6_34/48 or 6_17/24

500

Subtracting Mixed Numbers

14_1/8 - 9_5/6

4_14/48 or 4_7/24

500

If you drop me, I will crack, but give me a smile, and I'll smile right back. What am I

A mirror

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