16. 4,2
Yasmin has a box with 534 pictures in it.
Her brother Mark has 461 pictures
of his own.
How many pictures do they have all together?
995 pictures
17. 4,3
Betsy has 457 pennies.
She uses 230 of them to buy a magazine.
How many pennies does Betsy have left?
457-230=227 pennies
18. 4,4
Write a fraction for the part of
the set of T-shirts made up of striped T-shirts.
4/12 or 1/3
20. 5,2
Brad and Kate were solving an addition problem.
Kate told Brad that
212 + 451 = 823.
Use estimation to explain why you think Kate is wrong.
Estimate: 200 + 500 = 700
Actual: 653
21. 5,3
Your friend Anton told you that 647 − 127 = 416.
Use estimation to explain
why you think Anton is wrong.
Estimate: 600-100 = 500
Actual: 647-127 = 520
22. 5,4
Which would be a larger piece,
⅜ or ½ of the pizza?
½ because 1/2 is 4 pieces, but 3/8 is only 3 pieces