Grade 11Discuss with colleagues and IITians
here a trick to multiply the number of 8 to any numbers
such as
8 × 5
For 8, use your left hand and raise 3 fingers. This means there are 2 closed fingers
For 5, use your left hand and raise no finger. This means that there are 5 closed fingers
Sum of raised fingers = 3 + 0 = 3. This means we have 3 tens or 30
Product of closed fingers = 2 × 5 = 10. This means that we have 10 ones or 1 ten or 10
30 + 10 = 40
here a trick to multiply the number of 8 to any numbers
such as
8 × 5
For 8, use your left hand and raise 3 fingers. This means there are 2 closed fingers
For 5, use your left hand and raise no finger. This means that there are 5 closed fingers
Sum of raised fingers = 3 + 0 = 3. This means we have 3 tens or 30
Product of closed fingers = 2 × 5 = 10. This means that we have 10 ones or 1 ten or 10
30 + 10 = 40
