SME
Grade 1 Math · Geometry
Make halves and fourths of shapes
Use this for “The square has 4 equal parts. 1 part is shaded. How many are not shaded?”
Picture
Circle
Rectangle
4 equal parts (fourths): 1 shaded, 3 not shaded.
1 fourth shaded.
Tap a part to shade it.
This is an example. Choose the numbers from your problem to start.
Equal parts
example
Shaded parts
example
Not shaded
answer
Number sentences
1 of 4 equal parts shaded, 3 not shaded
Good to know
•
The parts must be equal: the same size.
•
2 equal parts are halves. 4 equal parts are fourths (quarters).
•
More parts means smaller parts. A fourth is smaller than a half.
Step-by-step
WE KNOW
Equal parts: 4
Shaded parts: 1
FIND
not shaded
Step 1 · Find not shaded
1 of 4 equal parts shaded, ? not shaded
Take the shaded parts away from all the parts.
4 − 1
Not shaded: 3 fourths
Not shaded: 3 (1 fourth is shaded, 3 fourths are not: 4 fourths make the whole)
Check
Put the numbers back in. Both sides should match.
1 of 4 equal parts shaded, 3 not shaded ✓
Topic check
See what you know: 5 questions on this topic
New questions each time. Pass to mark it complete.