Place Value
85 is the same as....
800 + 50
80 + 5
80 + 50
800 + 5
80+5
Add mentally by adding the tens and then adding the ones.
36 + 42
30 + 40 = 70
6 + 2 = 8
70+8 = 78
78
1,204 + 4,683 = ______
5887
Bill checked out 3 books from the library on Monday. On Thursday, he checked out 9 more books. How many books does Bill have now?
3 + 9 = 12
307 is the same as....
300 + 70
30 + 7
300 + 7
300 + 70
300 + 7
Add mentally by adding the tens and then adding the ones.
58+31=
50+30=80
8+1=9
80+9=89
89
5,021+3,934= _______
8955
Add these numbers.
5+6+3
5+6+3=14
26 is the same as ___ tens and ___ ones
2 tens and 6 ones
Use a doubles fact to help you add mentally.
8 + 7 =
15
4,796 + 2,307 = ________
7,103
Round to the nearest hundred. Then solve.
5,342 + 721 =
5,300 + 700 = 6,000
What is 4536 + 259 when rounded to the nearest hundred? (Write the addends to the nearest hundred)
4,500 + 200
Use a doubles fact to help you solve mentally.
5+7 =
5+5+2=12
7+7-2=12
6,791 + 3,017
9,808
Find the missing digit.
5721
+ 20_2
________
7773
The missing digit is 5.
5721
+ 2052
________
7773
What is 7469 + 422 when rounded to the nearest hundred? (Write the addends to the nearest hundred)
7,500 + 400
Make a ten to add mentally.
9+8=
9+8 is the same as 10+7
9+8=17
1,999 + 4,387
6,386
Mike sold 205 cookies at the bake sale. Christie sold 408 cookies at the bake sale. How many more cookies did Christie sell at the bake sale?
408-205 = 203
Christie sold 203 more cookies at the bake sale.