Topics
1. Number and Calculations
topic badge
AustraliaWA
Year 11

1.04 Estimation and reasonable answers

Lesson
Worksheet
Practice

Interactive practice questions

Estimate $99+61$99+61.

a

Round both numbers to the nearest $10$10.

$\editable{}+\editable{}$+

b

Calculate the estimate.

Easy
< 1min

Estimate $63-22$63−22.

Easy
< 1min

Estimate $898-132$898−132.

Easy
< 1min

Estimate $765+171$765+171.

Easy
< 1min
Sign up to access Practice Questions
Get full access to our content with a Mathspace account
Book a Demo
Sign up for free

Outcomes

1.1.1

use leading digit approximation to obtain estimates of calculations

1.1.2

check results of calculations for accuracy

1.1.4

ascertain the reasonableness of answers, in terms of context, to arithmetic calculations

1.1.10

apply approximation strategies for calculations if appropriate

1.1.11

use mental and/or flexible written strategies when appropriate

What is Mathspace

About Mathspace