- Adding and Subtracting Decimals
- Home
- Addition of Aligned Decimals
- Decimal Addition With 3 Numbers
- Subtraction of Aligned Decimals
- Decimal Subtraction: Basic
- Decimal subtraction: Advanced
- Decimal Addition and Subtraction With 3 or More Numbers
- Estimating a Decimal Sum or Difference
- Addition With Money
- Subtraction With Money
- Word Problem With Addition or Subtraction of 2 Decimals
- Word Problem With Addition of 3 or 4 Decimals and Whole numbers
- Word Problem With Subtraction of a Whole Number and a Decimal: Regrouping With Zeros
Estimating a Decimal Sum or Difference Online Quiz
Following quiz provides Multiple Choice Questions (MCQs) related to Estimating a Decimal Sum or Difference. You will have to read all the given answers and click over the correct answer. If you are not sure about the answer then you can check the answer using Show Answer button. You can use Next Quiz button to check new set of questions in the quiz.
Q 1 - Estimate the sum after rounding each number to the nearest hundredth
59.265 + 63.284 − 32.469 – 15.273
Answer : B
Explanation
Step 1:
The estimated sum after rounding each number to the nearest hundredth is
59.265 + 63.284 − 32.469 – 15.273 =
59.27 + 63.28 – 32.47 – 15.27 =
Step 2:
122.55 – 47.74 = 74.81
Q 2 - Estimate the sum after rounding each number to the nearest tenth
83.06 + 23.37 − 18.76 – 16.53
Answer : C
Explanation
Step 1:
The estimated sum after rounding each number to the nearest tenth is
83.06 + 23.37 −18.76 – 16.53 =
83.1 + 23.4 – 18.8 – 16.5 =
Step 2:
106.5 – 35.3 = 71.2
Q 3 - Estimate the sum after rounding each number to the nearest tenth
86.74 + 43.67 − 28.63 – 18.81
Answer : D
Explanation
Step 1:
The estimated sum after rounding each number to the nearest tenth is
86.74 + 43.67 − 28.63 – 18.81 =
86.7 + 43.7 – 28.6 – 18.8 =
Step 2:
130.4 – 47.4 = 83.0
Q 4 - Estimate the sum after rounding each number to the nearest hundredth
63.123 + 53.468 − 29.837 – 12.541
Answer : A
Explanation
Step 1:
The estimated sum after rounding each number to the nearest hundredth is
63.123 + 53.468 − 29.837 – 12.541 =
63.12 + 53.47 – 29.84 – 12.54 =
Step 2:
116.59 – 42.38 = 74.21
Q 5 - Estimate the sum after rounding each number to the nearest tenth
58.07 + 23.45 − 18.73 – 15.64
Answer : C
Explanation
Step 1:
The estimated sum after rounding each number to the nearest tenth is
58.07 + 23.45 − 18.73 – 15.64 =
58.1 + 23.5 – 18.7 – 15.6 =
Step 2:
81.6 – 34.3 = 47.3
Q 6 - Estimate the sum after rounding each number to the nearest tenth
43.03 + 12.48 − 8.52 – 14.29
Answer : D
Explanation
Step 1:
The estimated sum after rounding each number to the nearest tenth is
43.03 + 12.48 − 8.52 – 14.29 =
43.0 + 12.5 – 8.5 – 14.3 =
Step 2:
55.5 – 22.8 = 32.7
Q 7 - Estimate the sum after rounding each number to the nearest tenth
37.51 + 43.71 − 18.60 – 13.68
Answer : B
Explanation
Step 1:
The estimated sum after rounding each number to the nearest tenth is
37.51 + 43.71 − 18.60 – 13.68 =
37.5 + 43.7 – 18.6 – 13.7 =
Step 2:
81.2 – 32.3 = 48.9
Q 8 - Estimate the sum after rounding each number to the nearest tenth
78.94 + 67.41 − 28.78 – 13.62
Answer : C
Explanation
Step 1:
The estimated sum after rounding each number to the nearest tenth is
78.94 + 67.41 − 28.78 – 13.62 =
78.9 + 67.4 – 28.8 – 13.6 =
Step 2:
146.3 – 42.4 = 103.9
Q 9 - Estimate the sum after rounding each number to the nearest hundredth
67.097 + 34.593 − 27.465 – 44.763
Answer : A
Explanation
Step 1:
The estimated sum after rounding each number to the nearest hundredth is
67.097 + 34.593 − 27.465 – 44.763 =
67.10 + 34.59 – 27.47 – 44.76 =
Step 2:
101.69 – 72.23 = 29.46
Q 10 - Estimate the sum after rounding each number to the nearest tenth
87.85 + 43.31 − 17.90 – 24.14
Answer : B
Explanation
Step 1:
The estimated sum after rounding each number to the nearest tenth is
87.85 + 43.31 − 17.90 – 24.14 =
87.9 + 43.3 – 17.9 – 24.1 =
Step 2:
131.2 – 42.0 = 89.2