Decimal Rounding
What is 0.395 rounded to the nearest tenth?
0.4 or .4
How do we align multi-digit decimals to add?
Align them by the decimal point.
10.32-3.21
7.11
1.1 x 2
2.2
In 420 ÷ 21 = 20, what is the quotient?
20
What is 9.006 rounded to the nearest hundredth?
9.01
18.53+0.041
18.571
0.35-0.3
0.05
How do we align multi-digit decimal numbers to multiply?
We align numbers on the right side (regardless of where the decimal point is).
In 15,480 ÷ 86 = 180, what is the divisor?
86
What is 0.56 rounded to the nearest whole number?
1
4.518+0.1
4.618
4.3-4.11
0.19
7.09 x 3.1
21.979
In 38 ÷ 19 = 2, what is the dividend?
38
What is 3.4585 rounded to the nearest thousandth?
3.459
3.073+3.006
6.079
3.9-2.8
1.1
How is the standard algorithm for multiplying decimals different from the standard algorithm for adding/subtracting decimals?
When multiplying decimals, you align the numbers on the right-hand side, but when adding/subtracting decimals, you align the numbers based on the decimal point.
What are the steps for long division?
1. Find the first 5 multiples of your divisor.
2. Divide, Multiply, then Subtract. Bring it on down. Bring it on back!
What is 23,498,745 rounded to the nearest hundred thousand?
23,500,000
1.09+3.01
4.1
7.68-5.67
2.01
3.78 x 2.2
What is 8.316?
2142 ÷ 9
238