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Z.2 Comparing sizes: word problems

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Understanding Size Words

We use words like bigger, smaller, longer, shorter, taller, heavier, and lighter to compare objects. These words help us describe and measure the world around us.

Examples:
  • A car is bigger than a toy car.
  • A pencil is shorter than a broom.
  • A building is taller than a tree.
Helpful Hint

Look at two objects at the same time. Use size words to describe how they are different.

Comparing Length

Length tells us how long or short something is. We can compare objects by placing them side by side to see which one is longer or shorter.

Examples:
  • A rope is longer than a jump rope.
  • A crayon is shorter than a marker.
  • A train track piece is longer than a toy car.
Helpful Hint

Place objects next to each other with their ends lined up. This makes it easier to see which one is longer or shorter.

Comparing Height

Height tells us how tall or short something is. We can compare by standing objects up to see which is taller or shorter.

Examples:
  • A lamp is taller than a book.
  • A chair is shorter than a table.
  • A child is taller than a doll.
Helpful Hint

Stand objects on the same surface when comparing height. This makes it clear which one is taller.

Comparing Weight

Weight tells us how heavy or light something is. We can compare objects by holding them or using a balance scale.

Examples:
  • A backpack is heavier than a lunchbox.
  • A feather is lighter than a book.
  • A basketball is heavier than a tennis ball.
Helpful Hint

Use two hands or a balance scale to feel which object is heavier or lighter.

Solving Real-Life Problems with Size

We use size words every day to make choices and solve problems. Think about what you are comparing and choose the correct word to describe it.

Examples:
  • Sam has a tall glass and a short glass. He pours juice into the tall glass. The tall glass holds more.
  • Mia carries her backpack and her pencil case. The backpack is heavier.
  • Ben compares his shoes. One shoe is bigger because it belongs to his dad.
Helpful Hint

Always compare two objects carefully. Think about whether you are talking about length, height, or weight.