Area of a rectangle

Grade 3 · Level 4 · Sheet 1

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the answers

Name Date

Free from tutor.in4me.app · 3.MD.C.5, 3.MD.C.6, 3.MD.C.7.a, 3.MD.C.7.b, 3.MD.C.7.c, 3.MD.D.8 · Five minutes a day online, and the difficulty follows your child.

1.
What is the area of this rectangle?
8
8
Answer:
2.
What is the area of this rectangle?
6
7
Answer:
3.
What is the area of this rectangle?
7
7
Answer:
4.
What is the area of this rectangle?
3
4
Answer:
5.
What is the area of this rectangle?
6
5
Answer:
6.
What is the area of this rectangle?
5
8
Answer:
7.
What is the area of this rectangle?
3
7
Answer:
8.
What is the area of this rectangle?
6
9
Answer:
9.
What is the area of this rectangle?
4
3
Answer:
10.
What is the area of this rectangle?
9
9
Answer:
11.
What is the area of this rectangle?
10
6
Answer:
12.
What is the area of this rectangle?
9
8
Answer:

Show the answer key

1.64
2.42
3.49
4.12
5.30
6.40
7.21
8.54
9.12
10.81
11.60
12.72

The mistakes behind most wrong answers

A wrong answer in area of a rectangle is rarely random. These are the ones that come up most often, each on a real problem — worth knowing before you mark a sheet, because the fix for each is different.

What is the area of this rectangle?
10
8
The answer is 80. A child who answers 18 probably added the sides instead of multiplying them.
What is the area of this rectangle?
4
3
The answer is 12. A child who answers 9 probably counted one group too many or too few.
What is the area of this rectangle?
10
5
The answer is 50. A child who answers 30 probably gave the distance round instead of the space inside.

In the app, every wrong answer is matched against mistakes like these, and the weekly email tells you which one your child keeps making — in those words, not as a percentage.

Answer key · Area of a rectangle · Level 4 · Sheet 1

The mistakes behind most wrong answers