Vocabulary
A __________ is a group of 3 numbers that work together.
category, number, fact family
Fact family
Complete the fact family with the following numbers:
9, 22, 13
9 + 13= 22
13+ 9=22
22-9=13
22-13=9
Subtract:
34-7=
27
Subtract. Check by adding.
57-30=
_____+______=______
57-30= 27
27+30=57
There are 42 icicles. 9 of them melt. How many icicles are left?
33
The answer you get from subtracting is called the ________.
sum or difference
difference
Complete the fact family with the following numbers:
18, 24, 6
6+18=24
18+6=24
24-6=18
24-18=6
Subtract:
39-29=
10
Subtract. Check by adding.
40-26=
_____+______=______
40-26=14
14+26=40
There are 23 boys and 33 girls at a beach. 7 boys and 4 girls leave the beach. How many boys and girls left altogether?
45 left altogether. (Add 23 and 33 together=56) Then add (7 and 4=11).
Subtract 56-11=45
When you __________, you take something away from another number.
regroup, subtract
subtract
Complete the fact family with the following numbers:
37, 32, 5
5+32=37
32+5=37
37-5=32
37-32=5
Subtract:
72-35=
37
Subtract. Check by adding.
76-28=
_____+______=______
76-28=48
48+28=76
97 people went sailing yesterday. 38 people went sailing today. How many more people went sailing yesterday than today?
59
You can _________ a ten into ten ones.
take away, subtract, regroup
regroup
Which number sentence does not belong in the fact family for the numbers 7, 18, and 25?
18+7=25
7+18=25
18-25=7
25-7=18
18-25=7
Subtract:
26-19=
7
Subtract. Check by adding.
80-68=12
_____+______=______
80-68=12
12+68=80
56 cats are at the cat park. 14 cats go home. 15 cats come to the park. How many cats are at the cat park now?
57
56-14=42
42+15= 57
The numbers 3,5, and 8 make up a ___________.
new pattern, regroup, fact family
Fact Family
Sara wrote this fact family. Tell why Sara is wrong. Make is right.
76+ 12=88
12+76=88
76-12=88
12-76=88
She did not subtract the right numbers. It should be:
88-76=12
88-12=76
Subtract:
85-46=
39
Subtract. Check by adding.
91-45=
_____+______=______
91-45= 46
46+45=91
Tom has 58 apples. He gives 18 apples to Linda. He gives 22 apples to his neighbor. How many apples does Tom have left?
18
58-18=40
40-22=18