Add & Subtract Challenge
125 + 125 =
250
5 rounded to the nearest 10
10
There are 98 colored pencils in a bag. Five students each take 7 pencils from the bag. The number of pencils left in the bag is p. Which equation represents the situation?
A. 98 - 7 = p
B. 98 + 5 x 7 = p
C. 7 x p = 98 - 5
D. p = 98 - 5 x 7
D. p = 98 - 5 x 7
50+15=
65
100-10=
90
500 - 250 =
250
29 rounded to the nearest 10
30
Tom has 58 skittles. Joe has 35 skittles. About how many skittles do they have altogether?
They have about 100 skittles.
184+6=
190
456-123=
333
137 + 379 =
516
620 rounded to the nearest 100
600
There are seats for 500 students in the auditorium. There are 187 students from Clare's school and 229 students from Noah's school at the performance.
Noah estimates that there will be about 100 empty seats. Do you agree with Noah? Explain or show your reasoning.
Yes, I agree with Noah. Clare's school has 187 and 187 rounded to the nearest hundred is 200. Noah's school has 229 and 229 rounded to the nearest hundred is 200. 200 + 200 is 400. There are 500 seats. 500 - 400 = 100. That means there would be about 100 empty seats.
220+350=
570
820-610=
210
602 - 148 =
454
214 rounded to the nearest 10
210
5.Choose 3 statements that are true.
A. 126 rounded to the nearest ten is 120.
B. 126 rounded to the nearest hundred is 100.
C. 849 rounded to the nearest hundred is 800.
D. 849 rounded to the nearest hundred is 900.
E. 35 rounded to the nearest hundred is 0.
B. 126 rounded to the nearest hundred is 100.
C. 849 rounded to the nearest hundred is 800.
E. 35 rounded to the nearest hundred is 0.
167+250=
417
200-129=
71
900 - (302 + 49) =
549
1,049 rounded to the nearest 100
1,000
What are all of the numbers that Jake could round to 90?
85, 86, 87, 88, 89, 91, 92, 93, 94
199+456=
655
1,000-59=
941