Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 57 ones = _____
- 9 tens = _____
- 3 tens 1 ones = _____
- 1 tens 11 ones = _____
(a)
57 ones
= 57 x 1
= 57
(b)
9 tens
= 9 x 10
= 90
(c)
3 tens 1 ones
= 3 x 10 + 1 x 1
= 30 + 1
= 31
(d)
1 tens 11 ones
= 1 x 10 + 11 x 1
= 10 + 11
= 21
Answer(s): 57, 90, 31, 21