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Maths · Grade 3 · Set B
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B
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Goal: 15 min
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Remember: Cut a shape into rectangles. Find the area of each part. Add the parts. The area stays the same however you cut.

Two parts, one whole

1
A garden bed is cut in two parts. How many squares are in the light part?
2
How many squares cover the whole garden bed?
3
Which sentence matches the cut?
4 × 7 = 4 × 5 + 4 × 24 × 7 = 4 × 5 + 24 × 7 = 4 + 5 + 2
4
4 × 9 = 4 × 6 + 4 ×
5
A mat has 3 rows of 9 squares. The cut leaves 4 columns on the left. How many columns are on the right?
6
Which picture shows 5 × 6 cut into 5 × 4 and 5 × 2?
A
B
C
7
A hall rug is made of two parts. How many square feet cover the whole rug?

Splitting any shape

8
The left part is 12 squares and the right part is 8 squares. So the whole is 20 squares.
TrueFalse
9
Each square is 1 square unit. The L shape is cut in two rectangles. How many squares cover the whole L?
10
A tray is 4 rows of 6 squares. The dark part has 8 squares. How many squares are in the light part?
11
Join each cut to its total.
  1. 13 × 2 + 3 × 5
  2. 24 × 4 + 4 × 3
  3. 32 × 6 + 2 × 4
  4. 45 × 5 + 5 × 3
  • A28
  • B40
  • C20
  • D21
12
8 × 7 = 8 × 4 + 8 × 2
TrueFalse
13
Draw a line to cut the L into two rectangles. Write both areas and add them.
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