Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 39 ones = _____
- 9 tens = _____
- 3 tens 9 ones = _____
- 7 tens 18 ones = _____
(a)
39 ones
= 39 x 1
= 39
(b)
9 tens
= 9 x 10
= 90
(c)
3 tens 9 ones
= 3 x 10 + 9 x 1
= 30 + 9
= 39
(d)
7 tens 18 ones
= 7 x 10 + 18 x 1
= 70 + 18
= 88
Answer(s): 39, 90, 39, 88