Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 19 ones = _____
- 8 tens = _____
- 4 tens 2 ones = _____
- 2 tens 10 ones = _____
(a)
19 ones
= 19 x 1
= 19
(b)
8 tens
= 8 x 10
= 80
(c)
4 tens 2 ones
= 4 x 10 + 2 x 1
= 40 + 2
= 42
(d)
2 tens 10 ones
= 2 x 10 + 10 x 1
= 20 + 10
= 30
Answer(s): 19, 80, 42, 30