RATIONAL NUMBER WORLD PROBLEMS NO FRACTIONS BELLWORK SECTION

RATIONAL NUMBER WORLD PROBLEMS (NO FRACTIONS)

BELLWORK •

SECTION 1: KEY WORDS FOR MATH WORD PROBLEMS Add (+) Subtract (-) Plus Minus Times Divided Sum Difference Product Quotient More than Less than Multiplied Separated Increased by Decreased by Of Per Total Fewer than Increased/Decreas ed by a factor of Half (divide by 2) In all Subtract Twice or double (multiply by 2) Third (divide by 3) Combined Less Triple (multiply by 3) Each Together Remaining Each

Sally lives in North Dakota, where winter temperatures are often below zero. One day, thermometer read 10 degrees below zero, but it rapidly rose by 15 degrees in one hour as a warm front moved in. Then it dropped 15 degrees as night fell. What is the resulting temperature? You are back at -10º. The 15’s cancelled each other out to make zero. -10 + 15 – 15 = 10

A train first travels east for 20 kilometers. Then it turns north and travels for 43 kilometers. Next it goes west for 20 kilometers. Finally, it travels south for an unknown number of kilometers. At the end of the journey, the train is back at the original location. How far did it travel southward? 43 Kilometers South OR -43 kilometers

On Thursday it was 48°F. The temperature was 6° cooler later into the day. By the end of the day the temperature was 65°F. Write and expression that best represents the number of degrees the temperature changed from? 48 -6+23 You have to figure out how much the temperature changed from 48 ->6 degrees cooler, which would be 42 degrees, and then you have to figure out if it was 42 degrees and climbed to 65, how much did it climb->23 degrees

An object is at rest if all forces acting on the object have a net force of zero. If an object has a force of -5. 5 Newton applied to it, what force needs to be applied in order for the object to be at rest? It needs a +5. 5 net force applied to it.

What number do you need to add to +6 to get 0? Represent this information on a number line. -6 have someone come to the board to show us their number line

What number do you need to add to - 11 to get 0? Represent this information on a number line. +11 have someone come to the board to show us their number line

June starts hiking at sea level. She climbs 500 ft and then descends 175 ft. What is the integer represents the change in elevation June still needs to complete in order to reach sea level again? Show a visual representation of what June has already climbed. 500 -175=325 so she needs to go DOWN 325 more feet to go back to sea level

A helium atom has no charge if it has 2 protons (+) and 2 electrons (-). Which expression best represents this helium atom with no charge? ��. 2 + 2 = 0 ��. 2 - (-2) = 0 ��. 2 = -2 ��. 2 + -2 = 0

A plastic toy submarine is held 15 centimeters below the water surface in a bath tub. The submarine is let go and rises 15 centimeters. What integer represents the toy submarine’s position with respect to the surface of the water? If the toy submarine is then picked up out of the tub and held 20 centimeters above the water, what is the entire expression to represent the start to finish location of the submarine? -15+15=0 centimeters because it is back at the original position -15+15+20=20 centimeters because it is now being held ABOVE the original resting location of 0 centimeters

The temperature in the late afternoon was -7. 5°C. It dropped 5 degrees by early evening and then dropped another 8. 5 degrees by midnight. What was the temperature at midnight? -21°C

The floor of an elevator in a building is 30 feet above ground level. It travels down to the lower level of the building, where the floor is 10 feet below ground level. What distance has the elevator's floor traveled? 30 -(-10) = 40; 40 feet

Greg says that 3. 3 is a rational number. Kari says 3. 3 is not a terminating decimal. Who is correct and why? Kari is wrong because 3. 3 is a terminating.

A dive ring on the bottom of the pool is 10 feet below the surface of the water. Sabine dives down and brings the ring back to the surface. What integer represents the dive ring’s final position with respect to the surface of the water? 0 feet because it is now at sea level

Anthony borrows $6. 50 from a friend to pay for a sandwich and drink at lunch. Then he borrows $3. 75 from his sister to pay a library fine. Using negative numbers, write an equation to express Anthony’s total debt that day. -$6. 50 + (-$3. 75) = -$10. 25

The temperature at noon at a ski resort is 3°F. The temperature drops 8°F by midnight. What is the temperature at midnight? 3 – 8 = 3 + (-8) = -5; -5°F

Hannah says that 2. 11 is a rational number. Gus says that 2. 11 is a repeating decimal. Who is correct and why?

In the year 1944, computers weighed as much as 4, 500 kilograms each. The modern day laptop weights around 2. 7 kilograms. What is the overall change in weight of the computers? 4, 497. 3 kilograms of change

• An elevator is on the twentieth floor. It goes down 11 floors and then back up 5 floors. What floor is the elevator on now? 14 th floor

• The temperature at the North Pole was -25 degrees. It rose 3 degrees each hour for the next 4 hours. What is the temperature at the end of the 4 hours? -25+3+3= -13 degrees

• Mr. Smith had $367 in his bank account. At the end of the month he had to pay three bills. The telephone bill is $96. 40, the gas bill is $203. 20, and the electricity bill is $145. 30. How much does Mr. Smith need to deposit into his bank account to clear is overdraft? 96. 40+145. 30+203. 20=444. 90 -367= $77. 90 to get rid of his overdraft in his account

• Martin was $56. 80 overdrawn in his account. He then spend $234. 30 on his car note. How much is his total debt now? His debt is -$290. 60