Question

weekly math review - q1:7 date:
tuesday
circle all the odd numbers. underline all the even numbers.
382 489 227 550 138
round each number to the nearest 10 and 100.
757
998
336
ms. rivera has 876 pieces of paper to use for a class project. the students in her class donate 457 pieces of paper. how many pieces of paper does ms. rivera have altogether?
find the difference between 400 and 273.
find the missing addend.
_ + 99 = 164
dan ate 3 boxes of jellybeans. if there are 12 jellybeans in each box, how many jellybeans did dan eat in all?
solve
4×5=
48÷4=
8×4=
28÷4=
4×12=
8÷4=
9×4=
36÷4=
6×4=
12÷4=
10×4=
32÷4=
4×7=
24÷4=
carla bought 42 tomato plants. she planted them in 7 even rows. how many plants were in each row?

Explanation:

1. Circle Odd, Underline Even Numbers

• Odd numbers (not divisible by 2): 489, 227 (circle these)
• Even numbers (divisible by 2): 382, 550, 138 (underline these)

2. Round to Nearest 10 and 100

• 757:
• Nearest 10: \( 757 + 3 = 760 \) (since \( 757 - 750 = 7 \), \( 760 - 757 = 3 \), closer to 760)
• Nearest 100: \( 757 + 43 = 800 \) (since \( 757 - 700 = 57 \), \( 800 - 757 = 43 \), closer to 800)
• 998:
• Nearest 10: \( 998 + 2 = 1000 \) (since \( 998 - 990 = 8 \), \( 1000 - 998 = 2 \), closer to 1000)
• Nearest 100: \( 998 + 2 = 1000 \) (since \( 998 - 900 = 98 \), \( 1000 - 998 = 2 \), closer to 1000)
• 336:
• Nearest 10: \( 336 + 4 = 340 \) (since \( 336 - 330 = 6 \), \( 340 - 336 = 4 \), closer to 340)
• Nearest 100: \( 336 + 64 = 400 \)? No, \( 336 - 300 = 36 \), \( 400 - 336 = 64 \), closer to 300? Wait, 336 is between 300 and 400. 336 - 300 = 36, 400 - 336 = 64. So nearest 100 is 300? Wait, no: 336, the tens digit is 3, so when rounding to nearest 100, look at tens digit. 3 (tens) is less than 5, so round down to 300. Wait, earlier I thought 336 to nearest 100: 300. But let's recalculate:
• Nearest 10: 340 (correct, as 336 + 4 = 340)
• Nearest 100: 300 (since 336 is 36 away from 300, 64 away from 400, so closer to 300)

3. Total Paper Pieces

• Ms. Rivera has 876, students donate 457. Total = \( 876 + 457 \)
• \( 876 + 400 = 1276 \)
• \( 1276 + 57 = 1333 \)
• Answer: 1333

4. Difference Between 400 and 273

• \( 400 - 273 = 127 \)
• Answer: 127

5. Missing Addend (\( x + 99 = 164 \))

• \( x = 164 - 99 \)
• \( 164 - 100 = 64 \), then add 1 (since we subtracted 1 extra) → \( 64 + 1 = 65 \)
• Answer: 65

6. Jellybeans Eaten

• 3 boxes, 12 per box. Total = \( 3 \times 12 = 36 \)
• Answer: 36

7. Multiplication/Division Problems

• \( 8 \times 3 = 24 \)
• \( 4 \times 5 = 20 \)
• \( 48 \div 4 = 12 \)
• \( 8 \times 4 = 32 \)
• \( 6 \div 3 = 2 \)
• \( 28 \div 4 = 7 \)
• \( 4 \times 12 = 48 \)
• \( 8 \div 4 = 2 \)
• \( 6 \times 3 = 18 \)
• \( 9 \times 4 = 36 \)
• \( 36 \div 4 = 9 \)
• \( 6 \times 4 = 24 \)
• \( 3 \div 3 = 1 \)
• \( 12 \div 4 = 3 \)
• \( 10 \times 4 = 40 \)
• \( 32 \div 4 = 8 \)
• \( 4 \times 7 = 28 \)
• \( 24 \div 4 = 6 \)

8. Tomato Plants per Row

• 42 plants, 7 rows. Per row = \( 42 \div 7 = 6 \)
• Answer: 6

Answer:

1. Circle Odd, Underline Even Numbers

• Odd numbers (not divisible by 2): 489, 227 (circle these)
• Even numbers (divisible by 2): 382, 550, 138 (underline these)

2. Round to Nearest 10 and 100

• 757:
• Nearest 10: \( 757 + 3 = 760 \) (since \( 757 - 750 = 7 \), \( 760 - 757 = 3 \), closer to 760)
• Nearest 100: \( 757 + 43 = 800 \) (since \( 757 - 700 = 57 \), \( 800 - 757 = 43 \), closer to 800)
• 998:
• Nearest 10: \( 998 + 2 = 1000 \) (since \( 998 - 990 = 8 \), \( 1000 - 998 = 2 \), closer to 1000)
• Nearest 100: \( 998 + 2 = 1000 \) (since \( 998 - 900 = 98 \), \( 1000 - 998 = 2 \), closer to 1000)
• 336:
• Nearest 10: \( 336 + 4 = 340 \) (since \( 336 - 330 = 6 \), \( 340 - 336 = 4 \), closer to 340)
• Nearest 100: \( 336 + 64 = 400 \)? No, \( 336 - 300 = 36 \), \( 400 - 336 = 64 \), closer to 300? Wait, 336 is between 300 and 400. 336 - 300 = 36, 400 - 336 = 64. So nearest 100 is 300? Wait, no: 336, the tens digit is 3, so when rounding to nearest 100, look at tens digit. 3 (tens) is less than 5, so round down to 300. Wait, earlier I thought 336 to nearest 100: 300. But let's recalculate:
• Nearest 10: 340 (correct, as 336 + 4 = 340)
• Nearest 100: 300 (since 336 is 36 away from 300, 64 away from 400, so closer to 300)

3. Total Paper Pieces

• Ms. Rivera has 876, students donate 457. Total = \( 876 + 457 \)
• \( 876 + 400 = 1276 \)
• \( 1276 + 57 = 1333 \)
• Answer: 1333

4. Difference Between 400 and 273

• \( 400 - 273 = 127 \)
• Answer: 127

5. Missing Addend (\( x + 99 = 164 \))

• \( x = 164 - 99 \)
• \( 164 - 100 = 64 \), then add 1 (since we subtracted 1 extra) → \( 64 + 1 = 65 \)
• Answer: 65

6. Jellybeans Eaten

• 3 boxes, 12 per box. Total = \( 3 \times 12 = 36 \)
• Answer: 36

7. Multiplication/Division Problems

• \( 8 \times 3 = 24 \)
• \( 4 \times 5 = 20 \)
• \( 48 \div 4 = 12 \)
• \( 8 \times 4 = 32 \)
• \( 6 \div 3 = 2 \)
• \( 28 \div 4 = 7 \)
• \( 4 \times 12 = 48 \)
• \( 8 \div 4 = 2 \)
• \( 6 \times 3 = 18 \)
• \( 9 \times 4 = 36 \)
• \( 36 \div 4 = 9 \)
• \( 6 \times 4 = 24 \)
• \( 3 \div 3 = 1 \)
• \( 12 \div 4 = 3 \)
• \( 10 \times 4 = 40 \)
• \( 32 \div 4 = 8 \)
• \( 4 \times 7 = 28 \)
• \( 24 \div 4 = 6 \)

8. Tomato Plants per Row

• 42 plants, 7 rows. Per row = \( 42 \div 7 = 6 \)
• Answer: 6