Number Sense

Number Sense

Understanding numbers, their relationships and numerical reasoning

Algebra

Algebra

Using symbols to solve equations and express patterns

Geometry

Geometry

Studying shapes, sizes and spatial relationships in mathematics

Measurement

Measurement

Quantifying and comparing attributes like length, weight and volume

Operations

Operations

Performing mathematical operations like addition, subtraction, division

Probability and Statistics

Probability and Statistics

Analysing uncertainty and likelihood of events and outcomes

Community Resources

Get started with our Resources

Calculator Suite

Explore functions, solve equations, construct geometric shapes

Graphing Calculator

Visualise equations and functions with interactive graphs and plots

Geometry

Explore geometric concepts and constructions in a dynamic environment

3D Calculator

Graph functions and perform calculations in 3D

Scientific Calculator

Perform calculations with fractions, statistics and exponential functions

Notes

Explore our online note taking app with interactive graphs, slides, images and much more

Get started with the GeoGebra Apps

Number Sense

Number Sense

Understanding numbers, their relationships and numerical reasoning

Algebra

Algebra

Using symbols to solve equations and express patterns

Geometry

Geometry

Studying shapes, sizes and spatial relationships in mathematics

Measurement

Measurement

Quantifying and comparing attributes like length, weight and volume

Operations

Operations

Performing mathematical operations like addition, subtraction, division

Probability and Statistics

Probability and Statistics

Analysing uncertainty and likelihood of events and outcomes

Community Resources

Get started with our Resources

Calculator Suite

Explore functions, solve equations, construct geometric shapes

Graphing Calculator

Visualise equations and functions with interactive graphs and plots

Geometry

Explore geometric concepts and constructions in a dynamic environment

3D Calculator

Graph functions and perform calculations in 3D

Scientific Calculator

Perform calculations with fractions, statistics and exponential functions

Notes

Explore our online note taking app with interactive graphs, slides, images and much more

Get started with the GeoGebra Apps

小数を四捨五入

小数を四捨五入

小数を，整数に四捨五入しましょう．ボールを落として，四捨五入した数をたしかめましょう．

GeoGebra JA

Author:

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学んだことをまとめましょう

次の質問に，自分で考えたり，友だちと話し合ったりして，勉強したことをもっとしっかり身につけましょう．

Open-ended question 1

小数第1位で四捨五入すると1になる，最も大きい小数はいくつですか？

Text and maths input

Open-ended question 2

小数第1位で四捨五入すると1になる、最も小さい小数はいくつですか？

Text and maths input

GeoGebra JA

Author:

Share it with your students:

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Prerequisite Resources

Practice

GR. 4-5

Writing Expanded Form of Decimals up to the Thousandths Place

Practice

GR. 4-5

Rounding Whole Numbers up to the Hundred Thousands Place

Exploration

GR. 4-5

The Meaning of Place Value in Decimal Numbers

More from Rounding Decimals, Fractions, and Mixed Numbers

Exploration

GR. 4-5

Rounding Decimals

Practice

GR. 4-5

Rounding Decimals on a Number Line

Exploration

GR. 4-5

Rounding Mixed Numbers

Next Resources

Practice

GR. 6-8

Estimating Products of Decimals Using Area Models

Exploration

GR. 4-5

Estimating Sums of Fractions and Mixed Numbers Using a Number Line

Exploration

GR. 4-5

Decimal Multiplication Word Problems