Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 21 ones = _____
- 8 tens = _____
- 4 tens 1 ones = _____
- 3 tens 20 ones = _____
(a)
21 ones
= 21 x 1
= 21
(b)
8 tens
= 8 x 10
= 80
(c)
4 tens 1 ones
= 4 x 10 + 1 x 1
= 40 + 1
= 41
(d)
3 tens 20 ones
= 3 x 10 + 20 x 1
= 30 + 20
= 50
Answer(s): 21, 80, 41, 50