Mastering Mental Math Techniques

What is the first step in adding 34 and 58 using mental math?

• Divide each number by 2

• Combine the tens and ones separately

• Multiply both numbers by 2

• Subtract the smaller number from the larger

Tags

CCSS.2.NBT.B.5

What technique is used to add 69 and 45?

• Breaking down into tens and ones

• Long multiplication

• Guessing the closest number

• Using a calculator

Tags

CCSS.2.NBT.B.7

How do you simplify the subtraction of 38 from 75?

• Use long division

• Multiply both numbers

• Break down both numbers and subtract separately

• Add both numbers first

Tags

CCSS.7.NS.A.1C

How is subtraction of two numbers like 143 and 56 simplified?

• Breaking down into smaller numbers

• Using a calculator

• By multiplication

• By division

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

What is the result of multiplying 5 by 4 using the concept of repeated addition?

• 9

• 20

• 40

• 25

Tags

CCSS.3.OA.A.1

What is a simple way to multiply two-digit numbers like 20 and 13?

• Dividing both by 2

• Using the distributive property

• Adding repeatedly

• Subtracting each from 100

Tags

CCSS.6.NS.B.4

How do you approach multiplying 76 by 54 using mental math?

• Break down both numbers and multiply parts

• Divide 76 by 54

• Subtract 54 from 76

• Add 76 and 54

Tags

CCSS.5.NBT.B.5

What is the result of dividing 168 by 4 using mental math?

• 45

• 36

• 39

• 42

Tags

CCSS.4.NBT.B.6

What is the mental math strategy for dividing 234 by 3?

• Break down 234 into parts divisible by 3

• Subtract 3 from 234 repeatedly

• Multiply 234 by 3

• Add 234 and 3

Tags

CCSS.4.NBT.B.6

How can 324 be divided by 2 using mental math?

• By adding both numbers

• By subtracting 2 from 324

• By breaking down 324 and dividing each part by 2

• By multiplying 324 by 2

Tags

CCSS.3.OA.C.7