Round to Tenth
3.45
3.5
6.8 + 9.3
16
7+9=16
87.76 - 3.4
85
88 - 3 = 85
5+4
4+5
Commutative
What is the answer to a subtraction problem?
The difference
6.71
6.7
6.4 + 11.9
18
6+12=18
98.88 - 20.32
79
99 - 20 = 79
674 + 0
Identity
Give an example of making an estimate when adding decimals.
Rounding
24.872
24.9
27.89 + 3.3
31
28 + 3 = 31
8.14 - 6.5
1
8 - 7 = 1
(8+7) + 642
(7+642) + 8
Sarah has $40.00. She wants to purchase pumpkin rolls for dinner. If she has already spent $27 on soda, how much money does she have to spend on pumpkin rolls?
Sarah has $13.00 to spend on pumpkin rolls.
$40-$27=$13
twelve and sixty-four hundredths
twelve and six tenths
7.15 + 5.2
12
7 + 5 = 12
125.3 - 25.2
100
125 - 25 = 100
8+6+12+27 = 27+12+8+6
Commutative
Addition. Inverse means the opposite.
87.781
87.8
112.09 + 26.78
139
112 + 27 = 139
0.8 - 1.2
0
1 - 1 =0
1,234,567,894 + 0
Identity
Round 723.78 to the nearest tenth. Add 44 to that number.
767.8