Choose the answer.
1.
(1 pt)
which explanation best describes how to solve this problem?
gloria was taking photographs at a waterfall. she deleted 18 photographs. then, during the hike from the waterfall, she took 13 more. she deleted another 9. now gloria has 22 photographs left. how many photographs did gloria have to begin with?
a.
guess and test. guess that gloria had 40 photographs to begin with. subtract the number she deleted (18) and add the number she took (13). then subtract the second amount she deleted (9). this gives 26. that is 4 more than 22. add 4 to your guess. gloria had 44 photographs to begin with.
b.
draw a diagram. draw a large circle to represent the photographs gloria had to begin with. add 22 dots, 18 dots, and 9 dots to the circle. cross out 13 dots for the ones she took during the hike. add all remaining dots to figure out that gloria started with 36 photographs.
c.
translate into an equation. 18 + 13 + 9 – 22 = b
gloria had 18 photographs to begin with.
d.
work backward. start with the number of photographs that gloria has left (22). add the photographs that were deleted (18 + 9). then add photographs that she took during the hike (13).
gloria had 62 photographs to begin with.
choose the answer.
2.
(1 pt)
which explanation best describes how to solve this problem?
the toy factory makes 78 beach balls in a day. each day 5 of the beach balls are rejected because they have holes in them.
how many good beach balls can the toy factory make in 365 days?
a.
subtract 5 from 78. multiply the difference by 365.
b.
multiply 78 × 5. subtract the product from 365.
c.
add 365 and 78. multiply the sum by 5.
d.
add 5 and 78 and 365.
choose the answer.
3.
(1 pt)
which explanation best describes the answer to this problem?
a grocery store wants to put 61 watermelons into crates. each crate holds 12 watermelons.
what is the fewest number of crates that the store needs to hold the watermelons?
a.
multiply 61 by 12. the answer is 134. so the store needs 134 crates.
b.
multiply 61 by 12. the answer is 732. so the store needs 732 crates.
c.
divide 61 by 12. the answer is 5 with 1 left over. so the store needs 5 crates.
d.
divide 61 by 12. the answer is 5 with 1 left over. so the store needs 6 crates.
choose the answer.
4.
(1 pt)
which explanation best describes how to solve this problem?
cindy rode her bike for 10 miles, ran for twice as many miles as she rode her bike, and swam for 2 miles.
how many miles did cindy cover altogether?
a.
divide 10 by 2. then add 2 and 10 to the quotient.
b.
add 10 and 2 and multiply the sum by 2.
c.
add 10 and 2 and 10 and 2.
d.
multiply 10 × 2. then add 10 and 2 to the product.
choose the answer.
5.
(1 pt)
which explanation best describes the answer to this problem?
there are 86 seeds on each sunflower in a garden. there are 40 sunflowers.
how many sunflower seeds are there?
a.
multiply 40 by 86. the answer is 3,440. so there were 3,440 sunflower seeds.
b.
multiply 40 by 86. the answer is 3,240. so there were 3,240 sunflower seeds.
c.
divide 86 by 40. the answer is 2 with 6 left over. so there were 2 seeds.
d.
divide 86 by 40. the answer is 2 with 6 left over. so there were 26 seeds.
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