Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 90 ones = _____
- 5 tens = _____
- 3 tens 9 ones = _____
- 8 tens 12 ones = _____
(a)
90 ones
= 90 x 1
= 90
(b)
5 tens
= 5 x 10
= 50
(c)
3 tens 9 ones
= 3 x 10 + 9 x 1
= 30 + 9
= 39
(d)
8 tens 12 ones
= 8 x 10 + 12 x 1
= 80 + 12
= 92
Answer(s): 90, 50, 39, 92