Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 15 ones = _____
- 7 tens = _____
- 3 tens 1 ones = _____
- 8 tens 19 ones = _____
(a)
15 ones
= 15 x 1
= 15
(b)
7 tens
= 7 x 10
= 70
(c)
3 tens 1 ones
= 3 x 10 + 1 x 1
= 30 + 1
= 31
(d)
8 tens 19 ones
= 8 x 10 + 19 x 1
= 80 + 19
= 99
Answer(s): 15, 70, 31, 99