Addition
7,364+2,321
9,685
2,532-1,301
1,231
Michael and his family are driving 2,120 miles across the country over 4 days. The first day, they drove 517 miles. The second day, they drove 535 miles. The third day, they drove 493 miles. How many miles do they have left to drive?
517+535+493=1,545
2,120-1,545=575 miles
Estimate the sum of 2,258+4,926 to the nearest thousand
2,000+5,000=7,000
What does it mean to find the SUM?
Find the answer to an addition problem
42,818+7,120
49,938
12,469-10,212
2,257
A school is collecting cans for the local food pantry. The first week they collected 1,415 cans. The second week they collected 973 cans. The third week they collected 200 more cans than they collected in the second week. After the fourth week, they had a total of 4,542 cans. How many cans did they collect the fourth week?
973+200=1,173
1,415+973+1,173=3,561
4,542-3,561=981 cans
Estimate the difference of 5,246-1,392 to the nearest thousand.
5,000-1,000=4,000
What does it mean to find the DIFFERENCE?
Find the answer to a subtraction problem
9,087+7,668
16,755
33,071-2,893
30,178
The Honey Bears Stadium sol 25,050 student tickets and 30,975 general admission tickets for their first game. For their next game they sold 27,365 student tickets and 18,527 general admission tickets. How many more tickets did they sell for the first game.
25,050+30,975=56,025
27,365+18,527=45,892
56,025-45,892=10,133 more tickets
Estimate the sum of 33,783+ 12,516 to the nearest thousand
34,000+13,000=47,000
finding about what the answer is, not the exact answer
12,058+4,867
16,925
87,034-77,245
9,789
No.
Current weight: 7,125+3,238+4,615=14,978
Weight needed: 18,000
The seal needs 18,000-14,978=3,022 more grams of weight
Estimate the difference of 99,875-45,968 to the nearest thousand
100,000-46,000= 54,000
What is a VARIABLE?
a letter that represents an unknown number
37,391+85,642
123,033
172,005-48,273
123,732
A garden club wants to purchase land that costs $18,287. In January, before collecting monthly dues, the club has $15,185 in its account. The club collects $500 in membership dues each month. In what month will the garden club able to purchase the land?
Amount club needs: 18,287-15,185=3,102
Then add $500 for each month for each month. We find out that in July we will have $3,500 which is enough to buy the land.
Springfield School District ha 1,578 students last year. this year it has 2,138 students. Cameron says that the number of students increased by over 500 students. Is their statement reasonable?
Rounding to the nearest hundred gives an estimated difference of 2,100-1,600=500 which means their estimate IS reasonable
What does it mean to REGROUP?
to use place value to exchange equal amounts when renaming a number