Math Methods

Second Method

88

x16

• 1,409

• 1,408

Use the third method to solve

63

x15

• 946

• 945

Multiplying 5 times any number

5 x 44

• 220

• 202

Multiplying 5 times any odd number

5 x 37

• 186

• 185

10 and 11 times tricks

69 x10

• 690

• 6,900

10 and 11 times tricks

11 x 25

• 275

• 205

Multiplying numbers that ends in zero.

20 x 510

• 1,200

• 10, 200

• 100,020

Multiplying 2 digit numbers where the numbers in the ones place add up to 10.

42 x 48

• 20, 016

• 2,026

• 2,016

Divide mentally any number that is a multiple of 10 by 10

3,560/10

• 3,056

• 30,056

• 356

Use first method on page 8 to solve

62 x 14

• 868

• 869