Write number sentences that involve mixed operations.

Lesson

Practice

Lesson

When we solve number problems, sometimes we need to solve one part of our problem first, and then the rest. This video shows you how to work through two steps to solve one problem.

Worked Examples

Question 1

$Gwen$ collected sticks at the park and laid them on the ground in $2$2 groups with $3$3 sticks in each group.

$David$ also collected sticks and laid them on the ground in $5$5 groups with $5$5 sticks in each group.

$Gwen$ :

$David$ :

Which number sentence matches the total number of sticks?
$2+3\times5+5$2+3×5+5
A
$2+3+5+5$2+3+5+5
B
$2\times3+5\times5$2×3+5×5
C

Question 2

The following problem was being solved by $Marge$ and $Dave$ .

$5$5 boxes with $10$10 $donuts$ in each box were delivered to work in the morning. $6$6 $donuts$ were eaten over the course of the day. How many $donuts$ are left altogether?

Who was correct?
$Marge$ said that $5$5 boxes of $10$10 $donuts$ is $50$50 $donuts$ , and $6$6 less $donuts$ makes $44$44 $donuts$ in total.
A
$Dave$ said that $5$5 boxes of $10$10 $donuts$ is $15$15 $donuts$ , and $6$6 less $donuts$ makes $21$21 in total.
B
Write $Marge$ 's correct statement using a number sentence.

Outcomes

NA2-6

Communicate and interpret simple additive strategies, using words, diagrams (pictures), and symbols.