Subtraction 1-10
3-1=
3-1=2
25+_________=35
25+____10_____=35
Count up from 25 to 35.
56-22=
56-22=34
Use a number line or use a number chart.
49+11=
Did you have to regroup?
49+11=60
Did you have to regroup? YES
Rob has 26 rubber bands.
His sister gives him 17 more rubber bands.
How many does Rob have now?
26+17=43
Did you have to regroup? YES
8-8=
8-8=0
20+______+6=30
20+_ 4__+6=30
20+6=26
30-26=4
78-30=
78-30= 48
Use a number line or use a number chart.
25+45=
Did you have to regroup?
25+45=70
Did you have to regroup? YES
Zoey has collected 46 stamps.
Cat gives her 27 more stamps.
How many stamps does Cam have now?
46+27=73
Did you have to regroup? YES
8-7=
8-7=1
21+_____=33
21+__12___=33
33-21=12
Or count up
47-15=
47-15=32
Use a number line or use a number chart.
42+33=
Did you have to regroup?
42+33=75
Did you have to regroup? NO
Asher went to the pet shop.
He saw 10 fish, 5 cats, and 19 dogs.
How many animals did he see altogether?
10+5+19=34
10+5=15
19+15=34
Did you have to regroup? YES
6-3=
6-3=3
5+15+_____=30
5+15+__10___=30
5+15=20
30-20=10
67-8=
67-8=59
Use a number line or use a number chart.
What is regrouping?
What is regrouping?
Regrouping is when you build the ones into a ten and move it to the tens place value.
Ms. Paiva has 28 scholars, Mrs. Smith has 16 scholars, Miss. Souza has 22 scholars, and Miss. Bolton has 20 scholars.
How many scholars in all?
28+16+22+20=86
7-4=
7-4=3
5+25+________=40
5+25+___10_____=40
5+25=30
40-30=10
Or count up
40-30=
40-30=10
Use a number line or use a number chart.
18+16+12=
Did you have to regroup?
18+16+12=46
18+12=30
30+16=46
Did you have to regroup?