Estimate by rounding to find the answer
325
+264
------
300+300=600
330+260=590
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10
Estimate by rounding to the nearest hundred
523
+274
-------
500+300=800
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5
Which property is this?
567+0=567
Identity property/zero property
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baam
Lose 5 points!
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star
Double points!
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shark
Other team loses 20 points!
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lifesaver
Give 20 points!
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10
Which property is this?
73+32=32+73
Commutative property
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15
How would you solve this using break apart?
47+52=___
40+50=90
7+2=9
90+9=99
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10
Solve by rounding to the nearest ten
87
-23
------
90-20=70
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10
Natalia has 23 donuts. Danielle has 12 donuts. Which number sentence shows how many more donuts Natalia has?
A) 12-23+___
B) 23-___=12
C) 12+___=23
D) 23-12=___