Vocabulary
An __________ gives an approximate value rather than an exact answer.
estimate
Estimate to the nearest whole number and then solve.
2,345.378 - 1,204.9
1,140
5.543+14.623
20.166
35.698-17.541
18.157
The ________ is the name of our answer when we add two numbers together.
sum
Estimate to the nearest whole number and then solve.
205.98-106.42
100
3.61+2.59
6.20
59.612-17.267
42.345
The __________ is the name of the answer when a number is subtracted from another.
difference
Estimate to the nearest thousand and then solve
25,422+3,992
29,000
2,457.92+432.11
2,890.03
16,238.49-2,317.54
13,920.95
____________ is when we solve questions in our mind and not with pencil and paper.
mental math
Which is the best estimate of 61.4 + 88.3 when Estimating to the nearest tens place.
a. 100
b. 140
c. 150
d. 200
150
85 + 7.42 +16.15
108.57
Nicole is buying two posters. One costs $7.04 and the other costs $12.45. How much more does the second cost than the first.
$5.41
When we change and adjust one or all numbers to make an addition problem easier it is called __________
compensation
Round to the nearest tenth and then solve
34.567+72.389
106.9
76+31.87+5.3
113.17
Timothy went to the mall with $250. He bought new sneakers for $58.19, a new necklace for $45.22 and perfume for $98.72. How much money does Timothy have left after his purchases?
$47.87