Add or subtract using a open number line

There are 63 cats, 31 more come.  How many now?
63+31=

• 32
• 70
• 94
• 1,432

A snail crawled 20 inches, then 10 inches, then 40 inches.  How far did he crawl?
20+10+40=

• 70
• 50
• 60
• 100

Madden is 19 years old, Sean is 7 and Henry is 12.  How old are they all together?

• 72
• 40
• 28
• 38

Dorian has 48 M&M's. Evan gives him 16 more.  How many does he have now?
48+16=

• 21
• 64
• 57
• 100

Mrs. Gibb is 75, Ms. Swain is 25.  How much older is Mrs. Gibb than Ms. Swain?
75-25=

• 32
• 25
• 100
• 50

Harper has 51 rocks in her collection.  She finds 22 more.  How many does she have now?
51+22=

• 37
• 73
• 39
• 71

Mrs. Gibb has $30.  Eva has $50.  How much more money does Eva have than Mrs. Gibb?
50-30=

• 20
• 10
• 80
• 1,000,000

Mr. Austin is 93 years old.  Mrs. Catterson is 18.  How much older is Mr. Austin than Mrs. Catterson?
93-18=

• 85
• 200
• 80
• 75