Show:
1 digit x 1 digit
1 digit x 2 digit
1 digit x 3 digit
1 digit x 4 digit
Problem Solving: Extra or Missing Information
100
4x7
28
100
28x3
84
100
148x5
740
100
1,234x9
11,106
100
The lighthouse is 76 feet tall and has 99 stairs. An ocean liner is 3 times as tall as the lighthouse. What is the extra information if you want to find the height of the ocean liner?
The lighthouse has 99 stairs.
200
8x3
24
200
53x4
212
200
239x4
956
200
5,364x4
21,456
200
Seven students took a bus to the state park. The round-trip ticket cost $45 per student. They stayed for a few nights at a campground at a cost of $5 per student each night. Which missing information is needed to find the total amount each student spent on the camping trip?
The number of nights they camped.
300
7x7
49
300
21x6
126
300
3x329
987
300
4,927x6
29,562
300
Todd read 35 pages of his book on Saturday. He read for 10 minutes on Sunday. How many pages did Todd read over the weekend? Is there enough information to solve the problem? If not, what do you need to know? If there is, solve the problem.
There is not enough information to solve the problem. I need to know how many pages Todd read on Sunday.
400
9x6
54
400
28x6
168
400
985x8
7,880
400
6,829x5
34,145
400
Molly bought 150 sheets of paper and 5 notebooks. She put 50 sheets in her math folder, 25 sheets in her science folder, 25 sheets in her social studies folder, and 40 sheets in her reading folder. How many sheets did Molly have left? Is there enough information? If there is solve. Is there extra? Tell what it is.
Molly bought 5 notebooks is extra information; 10 sheets is the answer.
500
8x8
64
500
97x7
679
500
491x7
3,437
500
2,428x4
9,712
500
Mr. Lee drove 8 miles from his house to Parkside. Parkside is 4 miles south of Springfield. From Parkside, he drove 3 miles to Springdale. Then he drove 20 miles from Springdale to Brookville. How far did Mr. Lee drive in all, from his house to Brookville? Identify the extra or missing information. Solve if possible.
31 miles; the extra information is that Parkside is 4 miles south of Springfield.