Explore 2-Digit Addition
6Tens + 1Tens= _______ Tens
_____ + _____=_______
6Tens+1Tens=7Tens
60+10=70
17+3=_____
17+3=20
6Tens -1Ten= ______Tens
60-10=________
6Tens-1Ten=5 Tens
60-10=50
31-9
31-9=22
9Tens-3Tens=6Tens
90-30=__________
9Tens-3Tens=6Tens
90-30=60
65+3=_____
65+30=_____
65+3=68
65+30=95
49+42=_____
49+42=91
78-3=____
78-30=_______
78-3=75
78-30=48
40-27
40-27=13
77-3
77-3=74
Show 17+6
Do you need to regroup?
How many tens & ones?
17+6
yes
2Tens & 3Ones
23+29=______
23+29=52
Show 25-2
Do you need to regroup?
How many Tens & Ones?
25-2=23
NO
2Tens 3Ones
75-47
75-47=28
Estimate the sum.
39+32
40+30=70
13+14
13+14=27
Estimate the sum.
11+17
11+17=
10+20=30
25-16
25-16=9
Cedric has 46 baseball cards. He gives 9 baseball cards to Jasmine. How many baseball cards does Cedric have left?
46-9=37
Show 49-7
Do you need to regroup?
How many Tens & Ones?
49-7=42
NO
4Tens &2Ones
Mr. Garvey used 20 hotdog buns and 14 hamburger buns. How many buns did he use in all?
20+14=34
The zookeeper fed 25 baby monkeys. He also fed 12 adult monkeys. How many monkeys did the zookeeper feed?
25+12=37
Mia & Cheyenne are playing with 27 blocks. Mia puts away 9 of the blocks. How many are left?
27-9=18
Brina bakes 36 muffins. She gives 18 of muffins to Carl. How many muffins does Brina have left?
36-18=18
Sandy had 15 toy bugs. Nicky brought 19 more toy bugs to share. How many toy bugs did they have in all?
15+19=34