Arrays
Draw an array that shows:
5+5+5+5=20.
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3 + 3 =
What kind of fact is this? What is the answer?
Doubles fact!
3 + 3 = 6
Even.
If you circle pairs, they all have a partner.
15-10=
15 - 10 = 5
What is the multiplication fact for 4+4+4=12?
4x3=12
What addition sentence does this array show?
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4+4+4=12
or
3+3+3+3=12
Too many to list!
Is 7 even or odd? How do you know?
7 is odd because if you put pairs together, you will have one without a partner.
49-10=
49-10=39
What is the multiplication fact for 3+3+3+3+3=15?
3x5=15
What array shows 5+5+5=15?
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What doubles fact equals 12?
6+6=12
Is 13 even or odd?
Odd because the ones digit is odd & because there would be one without a partner if you paired up all of the ones in 13.
73-10=
73-10=63
8+8+8=24
Do columns go up and down or right and left?
Up and down.
Add 10 to 64
74
Do doubles facts have even or odd sums?
Even
4+4=8
3+3=6
7+7=14
110-10=
110-10=100
Draw an array that shows 5x5=
5x5=25
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Tell the repeated addition sentence for this array
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4+4 =8
2+2+2+2=8
Add 7+8 by making a 10
Show work!
Do doubles + 1 have even or odd sums?
104-10=
94
7x8=
7x8=56