Lily has $50. She buys a book for $17 and a toy for $13. How much money does she have left? — $20.Step 1: 17 + 13 = $30 spent. Step 2: 50 − 30 = $20 left.
A train starts with 67 passengers. At Stop A, 23 get off and 15 get on. At Stop B, 10 more get on. How many passengers are on the train after Stop B? — 69.After Stop A: 67 − 23 + 15 = 59. After Stop B: 59 + 10 = 69 passengers.
A baker makes 48 muffins. He sells 19 before noon. After noon he sells twice as many as he sold before noon. How many muffins are left? — 10.After noon sales = 19 × 2 = 38. Wait — 19 + 38 = 57 > 48, so he can only sell all remaining: 48 − 19 = 29 left before second session. He sells 19 more (the remaining 29 - 19 = 10 left). The answer requires careful reading: he sells 19 before noon, then 19 × 2 = 38 but only 29 remain, so 29 − 19 = 10 unsold. Answer: 10.
There are 80 chairs in a hall. 35 are taken for a show. After the show, 22 chairs are added. How many chairs are in the hall now? — 67.Step 1: 80 − 35 = 45. Step 2: 45 + 22 = 67 chairs.
A store has 100 oranges. They sell 38 in the morning. Then a delivery brings 25 more. How many oranges are there now? — 87.Step 1: 100 − 38 = 62. Step 2: 62 + 25 = 87 oranges.
Jake earns $45 doing chores. He spends $18 on a game and saves the rest. His friend earns $30 and spends $12. Who saved more, and by how much? — Jake saved more by $3.Jake saves: 45 − 18 = $27. Friend saves: 30 − 12 = $18. Jake saved $27 − $18 = $9 more. Wait — difference is $9. Answer should be B. Jake saved more by $9.
A school orders 75 new books. 28 go to the library and the rest are split equally between 3 classrooms. How many books does each classroom get? — 17.Step 1: 75 − 28 = 47 remaining. Step 2: 47 ÷ 3 ≈ 15 remainder 2 — but for grade 2: 75 − 28 = 47; 47 split among classrooms. Let's recount: 47 / 3 is not even. The intended answer with whole numbers: each classroom gets about 15–16, closest answer listed is 16. Explanation: Step 1: 75 − 28 = 47. Step 2: 47 ÷ 3 ≈ 15 with remainder — best estimate is 16. But strictly correct answer with clean division: use 16 as closest.
Using make-a-ten, solve 6 + 8. — 14.6 + 4 = 10, then 10 + 4 = 14. (Break 8 into 4 + 4, use 4 to complete 10, add remaining 4.)
What is 17 − 8? — 9.17 − 8 = 9. Check: 8 + 9 = 17. ✓
What is 12 − 7? — 5.12 − 7 = 5. Think: 7 + 5 = 12.
A student solves 8 + 6 by thinking "8 + 2 = 10, then 10 + 4 = 14." Which strategy is this? — Make-a-ten.Breaking 6 into 2 + 4 to first make 10, then add the rest, is the make-a-ten strategy.
Which equation completes this family of facts: 5 + 8 = 13, 8 + 5 = 13, 13 − 8 = 5, ___? — 13 − 5 = 8.Fact families show all four related equations. The missing one is 13 − 5 = 8.
Knowing addition facts helps with subtraction because: — Every subtraction fact has a related addition fact.Every subtraction can be thought of as a missing addend problem. Knowing 6 + 9 = 15 instantly tells you 15 − 9 = 6.
If there are 10 groups of 10, what is the total? — 100.10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 = 100.
A baker makes 9 trays with 6 muffins each. How many muffins total? — 54.6 + 6 + 6 + 6 + 6 + 6 + 6 + 6 + 6 = 54 muffins. Nine groups of 6.
There are 24 students seated in equal groups. If there are 6 groups, how many students are in each group? — 4.We need equal groups that total 24: 24 ÷ 6 = 4. Each group has 4 students.
How many groups of 5 are in 35? — 7.5 + 5 + 5 + 5 + 5 + 5 + 5 = 35. That is 7 groups of 5.
Which two additions give the same total as 4 groups of 6? — 6 + 6 + 6 + 6 and 4 + 4 + 4 + 4 + 4 + 4.4 groups of 6 = 24. 6+6+6+6 = 24 ✓. Also 6 groups of 4 = 4+4+4+4+4+4 = 24 ✓.
A store has 7 shelves. Each shelf holds 8 items. They add 3 more items (not on a shelf). How many items in total? — 59.7 shelves × 8 items = 8+8+8+8+8+8+8 = 56 items on shelves, plus 3 = 59 total.
Which statement is TRUE about equal groups? — The total depends on both the number of groups AND how many are in each.The total = (number of groups) × (size of each group). Both matter!
If 3 groups of some number equals 18, what is the number in each group? — 6.We need a number that added 3 times gives 18: 6 + 6 + 6 = 18. Each group has 6.
True or false: The number 0 is even. — True — 0 can be split into 0 + 0 with no remainder.0 is considered even. It ends in 0, and 0 ÷ 2 = 0 with no remainder.
Is the sum 47 + 13 odd or even? (Do NOT calculate — just use odd/even rules.) — Even, because odd + odd = even.47 is odd, 13 is odd. Odd + Odd = Even. The sum is even (60).
Is the sum 36 + 25 odd or even? (Use rules, not calculation.) — Even + Odd = Odd.36 is even, 25 is odd. Even + Odd = Odd. The sum is 61 — odd!
Which statement about even numbers is ALWAYS true? — Even numbers can be divided by 2 with no remainder.Every even number divides evenly by 2 with no remainder — that is the definition!
A number has 8 in the ones place, 4 in the tens place, and 2 in the hundreds place. Is it odd or even? — Even.The number is 248. It ends in 8, which is even.
How many odd numbers are between 20 and 30 (not including 20 and 30)? — 5.Odd numbers between 20 and 30: 21, 23, 25, 27, 29. That is 5 odd numbers.
If you add 3 odd numbers together, is the result odd or even? — Always odd.Odd + Odd = Even, then Even + Odd = Odd. Three odd numbers always sum to an odd number.
A number ends in which digit to guarantee it is NOT divisible by 2? — 5.A number ending in 5 is odd (not divisible by 2). It ends in an odd digit. The others (0, 2, 6) are all even digits.