Math 4 Mental Math MM 4-1 8. How many quarters are in a ...

Math 4 ? Mental Math

MM 4-1

1. What number is 20 more than 40? (60) 2. What number is 30 less than 60? (30) 3. Start with 6. Add 3. Subtract 4. (5) 4. Start with 8. Subtract 5. Add 3. (6) 5. What number is halfway between 20 and 30? (25) 6. Add 40+6. (46) 7. Add 50+30. (80) 8. How many quarters are in a dollar? (4)

MM 4-2

1. What number is 20 more than 50? (70) 2. What number is 10 less than 40? (30) 3. Start with 9. Subtract 6. Add 2. (5) 4. Start with 4. Add 7. Subtract 9. (2) 5. What number is halfway between 60 and 70? (65) 6. What is in the tens place in 432? (3) 7. What number is in the hundreds place in 687? (6) 8. How many dimes are in a dollar? (10)

MM 4-3

1. What is 30 + 60? (90) 2. What is 80 ? 40? (40) 3. What is 3 + 6 + 4? (13) 4. What is 5 + 5 ? 6? (4) 5. Round 46 to the nearest 10. (50) 6. Round 7,862 to the nearest thousand. (8,000) 7. What is 6 tens and 3 ones? (63) 8. What is 8 tens and 5 ones? (85)

MM 4-4

1. What is 90 ? 20? (70) 2. What is 30 + 40? (70) 3. What is 7 + 5 + 4? (16) 4. What is 8 + 2 + 3? (13) 5. Round 415 to the nearest hundred. (400) 6. Round 2,232 to the nearest thousand. (2,000) 7. What is 9 tens and 6 ones? (96) 8. What is 3 hundreds, 4 tens, and 6 ones? (346)

MM 4-5

1. Of these numbers, which 2 numbers make 10? 4, 5, and 6. (4, 6) 2. Add 4 + 6 + 7. (17) 3. What number is 3 thousands, 2 hundreds? (3,200) 4. What number is 4 hundreds, 5 tens, 2 ones? (452) 5. Sam has 2 birds, 3 cats, and 2 hamsters. How many pets does he

have? (7) 6. What is 20 more than 60? (80) 7. What is 20 more than 360? (380) 8. What is 10 more than 180? (190)

MM 4-6

1. Which two of these numbers make 10? 3, 5, and 7. (3, 7) 2. Add 5 + 3 + 7. (15) 3. What number is in the hundreds place in 3,642? (6) 4. What number is 6 hundreds and 2 ones? (602) 5. Sarah has 4 red stamps, 6 blue, and 7 green. How many stamps

does she have? (17) 6. What is 30 + 40? (70) 7. What is 20 + 130? (150) 8. What is 40 + 410? (450)

MM 4-7

1. Start with 300, and write the next 5 numbers. (301, 302, , 303, 304, 305)

2. Write all of the even numbers between 30 and 40. (32, 34, 36, 38) 3. What is 30 more than 120? (150) 4. What is 50 less than 170? (120) 5. What is halfway between 100 and 200? (150) 6. Add 6 + 3 + 7. (16) 7. Add 3 + 8 + 2. (13) 8. What is halfway between 1,000 and 2,000? (1,500)

MM 4-8

1. Start with 1,000. Write the next 5 numbers. (1001, 1002, 1003, 1004, 1005)

2. Write all the odd numbers between 50 and 60. (51, 53, 55, 57, 59) 3. What is 210 + 60? (270) 4. What is 190 ? 40? (150) 5. What is halfway between 300 and 400? (350) 6. What is halfway between 2,000 and 3,000? (2,500) 7. Add 8 + 5 + 5. (18) 8. Add 9 + 7 + 3. (19)

MM 4-9

1. What number is in the tens place in 732? (3) 2. What number is in the tens place in 506? (0) 3. How much is 12 tens? (120) 4. How much is 26 tens? (260) 5. I'm thinking of a number between 20 and 40. It has a 5 in it. What

number could it be? (25 or 35) 6. Add 13 + 4. (17) 7. Add 24 + 5. (29) 8. Add 62 + 8. (70)

MM 4-10

1. What number is in the hundreds place in 5, 822? (8) 2. What number is in the hundreds place in 6,032? (0) 3. How much is 16 tens? (160) 4. How much is 24 hundreds? (2400) 5. Add 36 + 3. (39) 6. Add 83 + 7. (90) 7. Add 26 + 4. (30) 8. Tim had 40 pages in his notebook. He tore out 10. How many are

left? (30)

MM 4-11

1. Make the largest number you can with 1, 2, and 3. (321) 2. Make the smallest number you can with 1, 2, and 3. (123) 3. Round 36 to the nearest ten. (40) 4. Round 81 to the nearest ten. (80) 5. Add 3 + 9 + 7. (19) 6. What is 10 + 16? (26) 7. What is 20 + 32? (52) 8. Maria had $10. She spent $2 on pencils and $1 on candy. How much

did she have left? ($7)

MM 4-12

1. Round 85 to the nearest ten. (90) 2. Round 618 to the nearest hundred. (600) 3. Add 4 + 9 + 6. (19) 4. What is 20 + 56? (76) 5. What is 20 + 256? (276) 6. What is 40 + 120? (160) 7. How many nickels are in a dollar? (20) 8. How many nickels are in two dollars? (40)

MM 4-13

1. Write the even numbers between 230 and 240. (232, 234, 236, 238) 2. Write the odd numbers between 450 and 460. (451, 453, 455, 457,

459) 3. What is 200 + 426? (626) 4. What is 400 + 210? (610) 5. What is 20 + 150? (170) 6. What is 40 + 620? (660) 7. Add 26 + 20. (46) 8. How much greater is 70 than 40? (30)

MM 4-14

1. Make the largest number you can with 2, 4, and 6. (642) 2. What number is in the tens place in 4,000? (0) 3. What is 50 + 610? (660) 4. What is 90 ? 40? (50) 5. What is 540 ? 20? (520) 6. What is 670 ? 40? (630) 7. Subtract 20 from 78. (58) 8. Start with 9. Subtract 5. Add 4. Add 3. Subtract 2. Write the answer.

(9)

MM 4-15

1. How many dimes in 2 quarters? (5) 2. How many nickels in 2 quarters? (10) 3. What time is 30 minutes after 5 o'clock? (5:30) 4. What time is 30 minutes after 5:15? (5:45) 5. What number is 8 hundreds and 4 tens? (840) 6. What number is 3 hundreds and 4 tens? (340) 7. What is 16 + 4? (20) 8. What is 16 + 5? (21)

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