Grade 2 Math: 10 Free Practice Questions

Answer: 155
The number is 155. First find 10 more than 245: 245 + 10 = 255. Then find 100 less than 255: 255 − 100 = 155. Students may reverse the operations or change the wrong place value, such as subtracting 10 and adding 100 to get 335, or altering the ones digit.

Answer: 40
✅ Correct Answer: 40 🧒 For Kids: Work BACKWARDS from the end! End: 48 stickers Undo '+23': 48 − 23 = 25 Undo '−15': 25 + 15 = 40 Maria started with 40 stickers! Check: 40 − 15 = 25, then 25 + 23 = 48 ✓ 💡 Tip: When working backwards, REVERSE each operation: + becomes −, and − becomes +! 👨‍👩‍👧 For Parents: Working backwards from a known result to find a starting value — a powerful algebraic reasoning skill that combines NY-2.OA.1 with inverse operations.

Answer: 7 kilometers
The total length of the trail is 7 kilometers. Add the two parts of the trail: 4 kilometers + 3 kilometers = 7 kilometers. Students may miscount or add incorrectly, arriving at 6 or 8 kilometers due to careless addition.

Answer: 9 inches
The book is 9 inches long. Subtract the starting mark from the ending mark: 10 inches - 1 inch = 9 inches. Students may read the ending mark (10) as the length without subtracting the starting point.

Answer: 40
About 40 birds remain, since 80 − 40 = 40. Round 76 to 80 and 41 to 40. Subtract: 80 − 40 = 40. Students round 76 down to 70, producing an estimate of 30 instead of the correct 40.

Answer: 4
A rectangle has 4 sides and 4 corners.

Answer: Quarter
The quarter has the greatest value at 25 cents. Comparing values: penny = 1 cent, nickel = 5 cents, dime = 10 cents, quarter = 25 cents. The quarter is the largest value among these four coins. Students may choose the dime because it is physically the smallest coin, incorrectly assuming size relates to value.

Answer: 0.1
One tenth is written as 0.1. One tenth means 1 out of 10 equal parts. The tenths place is the first place to the right of the decimal point, so one tenth is written 0.1. Students write 1.0, which is one whole, or 0.01, which is one hundredth.

Answer: 14
Jake has 14 stickers left. Find the total first: 6 + 6 + 6 = 18. Then subtract the stickers given away: 18 - 4 = 14. Students may forget the subtraction step and answer 18, or subtract incorrectly.

Answer: 5 + 5 + 5 = 15
3 groups of 5 is shown by 5 + 5 + 5 = 15. Since there are 3 groups, write 5 three times and add: 5 + 5 + 5 = 15. Students often confuse the number of groups with the group size, writing 3 + 3 + 3 instead of 5 + 5 + 5.