Question

(a) How could you calculate 23 x 4 on your calculator if the 4 button is broken? (b) How could you calculate 23 x 21 if the 2 button on your calculator is broken?
A school has 400 students. They all come to school by bus, and each bus carries the same number of students. How many students might there be on each bus?

I put some counters into groups with the same number in each group. I can’t remember what I did, but I do remember that I had 12 counters. What might the groups have been?

Answer 1

Question 1 A. Do 23 times 2 times 2. This will give you the same answer as if you were to use 4.

Question 1 B. Use 10 times 2 plus the number in the ones place, then multiply  them together.

Question 2. There would be an average of 40 student per bus, therefore, there will be 10 buses, and 40 students in each bus.

Question 3. You could put 12 counters in: 6 groups of 2, 2 groups of 6, 4 groups of 3, or 3 groups of 4. (I think there's more but that's all I can think of. Hope you got the memo)

Hope this helped! :D

Answer 2

Answer:

23 times 8 then divide the answer by two

(i looked it up and the answers are the same.)