Addition (One digit)：練習問題

Calculate the following:
\( 4 + 0 = ? \)

A garden has 9 red roses and 5 white roses.
How many roses are there in total?

Which of the following addition expressions has a total sum equal to 16?

Anna picks 3 red flowers and 3 yellow flowers. How many flowers does she have in total?

Look at the number sentence below:
\( 5 + \text{___} = 7 \)
What number belongs in the blank?

Calculate: \( 3 + 4 \)

Which two single-digit numbers can be added together to make exactly 10? Provide one example.

Mary has 2 apples and John gives her 1 more apple. How many apples does Mary have in total?

Solution:

Mary starts with 2 apples. Adding the 1 apple from John, she has \(2+1=3\) apples.

Three friends, Amy, Ben, and Chloe, are playing a game with cards. Each card has a one-digit number on it. Amy has 7 cards and Ben has 5 cards. Chloe has 4 cards.

a) How many cards do Amy and Ben have altogether?
b) If Chloe gives 3 of her cards to Ben, how many cards does Ben have now?
c) Use the commutative property (changing the order of numbers) to write a different addition sentence that shows the same total of cards Amy and Chloe have together. (Hint: Amy has 7 and Chloe has 4).<\/p>