2
Plus and equals signs
Joyful Mathematics: Chapter 5
GoalRead and write an addition sentence with + and =.
New words
plus (+) · join, or addequals (=) · makes, or is the same asaddition sentence · numbers with + and =
Explanation
We can write adding with signs. The sign + says plus. It means join. The sign = says equals. It means makes. 4 + 2 = 6 is read: four plus two equals six. It means 4 and 2 altogether make 6.
Worked examples
3 + 2 = 5. Three bells plus two bells equals five bells.
5 + 1 = 6. The frame shows 5 dots and 1 more dot.
Read it aloud: 2 + 6 = 8. Two plus six equals eight.
Class activity
Sign cards. Cut small paper cards. Write + on one card, = on another, and the numbers 1 to 6 on the rest. Lay out a sentence such as 2 + 3 = 5 with the cards. Read it aloud. Change the numbers to make new sentences and check each one with buttons.
Practice
1
Write the addition sentence for the picture.
2 + 3 = 5.
2
Read aloud: 4 + 3 = 7. What does + mean?
Plus: join the groups.
3
Write the addition sentence for the dots.
6 + 2 = 8.
4
Fill in: 5 + 4 = ___
9.
5
Which sign means makes: + or =?
The sign =.