Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 72 ones = _____
- 9 tens = _____
- 2 tens 8 ones = _____
- 5 tens 19 ones = _____
(a)
72 ones
= 72 x 1
= 72
(b)
9 tens
= 9 x 10
= 90
(c)
2 tens 8 ones
= 2 x 10 + 8 x 1
= 20 + 8
= 28
(d)
5 tens 19 ones
= 5 x 10 + 19 x 1
= 50 + 19
= 69
Answer(s): 72, 90, 28, 69