Mental Math
Use mental math to add
1,218 + 1,598
2,816
The Perez family is driving to visit relatives. The trip is 184 miles and they have driven 48 miles. How many more miles do they need to drive?
136 miles
Use estimation to decide which is a reasonable difference.
38,041 - 19,558
a. 21,374
b. 16,483
c. 18,473
2-2 # 19
c. 18,473
Add.
23,100 + 74,900
98,000
Celia used an addition expression to find 6 x 5. Which addition sentence did she write?
5 + 5 + 5 + 5 + 5 + 5
Estimate 5,323 >>>> _,000
+2,611 >>>> _,000
______________________________
8,000
Use Mental Math to find:
5,280 - 1,997
3,283
Multiply
4 x 40 =
160
Estimate 49,761 >>>> _0,000
+59,499 >>>> _0,000
______________________________
110,000
Use mental math to find:
6,794 -999=
5,795
Five people bought tickets.
They bought 8 tickets each.
How many raffle tickets did they buy in all?
40 tickets
Estimate 4,225 + 98 =
4,300
Subtract
7,000 - 827
6,173
Caiden builds a sandbox for his cousin. The sandbox is 4 feet by 3 feet.
What is the perimeter of the sandbox?
14 feet
Estimate each difference.
24,300 - 10,125 =
14,000