Rounding
Round 96.624 to the nearest whole number
97
Estimate this problem: 16.07+0.459
16
16.07+0.459
16.529
If you see the keyword in all what do you do?
Add
Name that property:
yx=xy
Commutative Property
Round 787.491 to the nearest whole number
787
Estimate this problem: 90.01-7.83
82
6.07+4.3
10.37
If you see the keyword how many more what do you do?
Subtract
Name that property:
(84+78)+12=84+(78+12)
Associative Property
Round 25.94 to the nearest whole number
26
Estimate this problem: 804-76.514
727
90.01-7.83
82.18
Sara walked 4.8 miles yesterday, and she walked 3.12 miles today. How many miles did she walk in all?
4.8+3.12=
7.92 miles
Using the Associative Property rewrite this expression:
(4+5)+8
(4+5)+8=4+(5+8)
Round 1,248.67 to the nearest whole number.
1,249
Estimate this problem: 4.759-3.802
1
804-76.514
727.486
When Jim was born, he weighed 7.8 lbs. His sister Laura weighed 6.9 lbs. How many more pounds did Jim weigh than Laura?
7.8-6.9=
0.9 lbs
Using the Commutative Property rewrite the expression:
15x4x18
15x4x18=18x4x15
Round 349.52 to the nearest whole number.
350
Estimate this problem: 6.07+4.3
10
4.759-3.802
0.957
Leon went to Menards and bought a tool set for $45.15. He then went to Ace Hardware and bought a weed trimmer for $84.42. Leon had $200 in cash in his wallet. How much money does he have left?
First 45.15+ 84.42= 129.57
Then 200-129.57=
$70.43
Which property allows you to group different numbers in a problem?
The Associative Property