Post by surbhi121 on Jul 29, 2019 6:49:57 GMT -6
1)Quickly square a two-digit number that ends in 5
Let’s use the number 35 as an example.
Step 1: Multiply the first digit by itself plus 1.
Step 2: Put a 25 at the end.
35 squared = [3 x (3 + 1)] & 25
[3 x (3 + 1)] = 12
12 & 25 = 1225
35 squared = 1225
2)Multiplying numbers that end in zero
Multiplying numbers that end in zero is actually quite simple. It involves multiplying the other numbers together and then adding the zeros at the end. For instance, consider:
200 x 400
Step 1: Multiply the 2 times the 4
2 x 4 = 8
Step 2: Put all four of the zeros after the 8
80,000
200 x 400= 80,000
Maths Home Tutor | Home Tuition Services
Let’s use the number 35 as an example.
Step 1: Multiply the first digit by itself plus 1.
Step 2: Put a 25 at the end.
35 squared = [3 x (3 + 1)] & 25
[3 x (3 + 1)] = 12
12 & 25 = 1225
35 squared = 1225
2)Multiplying numbers that end in zero
Multiplying numbers that end in zero is actually quite simple. It involves multiplying the other numbers together and then adding the zeros at the end. For instance, consider:
200 x 400
Step 1: Multiply the 2 times the 4
2 x 4 = 8
Step 2: Put all four of the zeros after the 8
80,000
200 x 400= 80,000
Maths Home Tutor | Home Tuition Services