Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 81 ones = _____
- 7 tens = _____
- 3 tens 7 ones = _____
- 3 tens 17 ones = _____
(a)
81 ones
= 81 x 1
= 81
(b)
7 tens
= 7 x 10
= 70
(c)
3 tens 7 ones
= 3 x 10 + 7 x 1
= 30 + 7
= 37
(d)
3 tens 17 ones
= 3 x 10 + 17 x 1
= 30 + 17
= 47
Answer(s): 81, 70, 37, 47