Remember: A loop can sit inside another loop. The inside loop runs all the way through every time the outside loop goes round, so you multiply.
Read and answer
Read the story, then answer.
Three rows of fourMina and Teo were building a stone path, and Bo pushed a wheelbarrow full of flat gray stones. Mina needed twelve stones, in three rows with four stones in every row. Writing every step made a list that tumbled off the table, so she used a loop. Then she put one loop inside another. The outside loop said repeat three times. Inside it sat the inside loop: repeat four times, lay a stone. After the inside loop came step down. The inside loop laid a whole row, Bo stepped down, and the outside loop went round again. Three rows of four made twelve stones. Grandpa Joe's nesting dolls showed the idea: a smaller doll sits inside a bigger doll.
1
In Mina's program, how many times does step down run?
1243
2
The number of stones is the outside number plus the inside number.
TrueFalse
3
The inside loop runs all the way through each time the outside loop goes .
offawayround
4
Look at the program. How many stones does Bo lay in all?
71025
5
Look at this program. How many times does Bo step down?
3412
Count, order and fix
6
With the outside loop at 3 and the inside loop at 4, join each step to how often it runs.
1push the wheelbarrow
2lay a stone
3step down
A3 times
B12 times
C1 time
7
Put one row of the path in order.
Bo steps down
The outside loop goes round again
The outside loop starts a round
The inside loop lays four stones
8
The stones marched off the bed into the carrots. What is the mix-up to fix?
Change the 3 to a 4Add another lay a stone lineMove step down out of the inside loop, to just after it
9
In the buggy program above, how many times does Bo step down?
1234
10
The outside loop is repeat 5 times and the inside loop is repeat 4 times: lay a stone. How many stones?
92054
11
Teo sets a table with a loop inside a loop: one round per person, and each round puts out a fork, a spoon and a cup. How many things for 4 people?
7129
12
Draw the path Mina built: three rows with four stones in every row.
Scan the code at the top to mark this sheet on screenTake a photo of your answers or type them. It is marked for you automatically, and your score is kept.