Add/sub with Estimating

1.  There are 345 pencils in the drawer. Sally placed 634 more pencils in the drawer. About how many pencils are now in the drawer?

• 900
• 234
• 979
• 400

1.  Mark has 267 baseball cards.  Emily has 365 baseball cards.  About how many more baseball cards does Emily have than Mark?

• 400
• 700
• 543

Sara had 729 dimes in her bank. She spent 513 of her dimes. About how many dimes does she have now ? 

• 200
• 300
• 123
• 453

Paul got a box of 479 crayons for his birthday. At the end of the school year, he only had 134 left. About how many crayons had been lost or given away? 

• 100
• 234
• 400
• 300

79 birds were sitting in a tree. 38 more birds flew up to the tree. About how many birds were there altogether in the tree? 

• 80
• 34
• 120
• 243

231 birds were sitting in a tree. Some more fly up to the tree. Then there were 312 birds in the tree. About how many more  fly up to the tree?

• 200
• 100
• 400
• 432

Tim grew 134 watermelons. Fred grew 111 watermelons. About how many watermelons did they grow in total? 

• 100
• 300
• 234
• 200

Dan played soccer for 34 minutes on Monday, 54 minutes on Tuesday, and 23 minutes on Wednesday.  About how many minutes did Dan play soccer for?

• 100
• 24
• 50
• 300

Tyler’s school has 95 boys and 179 girls. About how many kids are there altogether?

• 100
• 300
• 359
• 500

220 people were at the baseball game. It started raining, so 86 people went home. About how many people were left? 

• 435
• 300
• 110
• 376