Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 15 ones = _____
- 9 tens = _____
- 2 tens 3 ones = _____
- 7 tens 10 ones = _____
(a)
15 ones
= 15 x 1
= 15
(b)
9 tens
= 9 x 10
= 90
(c)
2 tens 3 ones
= 2 x 10 + 3 x 1
= 20 + 3
= 23
(d)
7 tens 10 ones
= 7 x 10 + 10 x 1
= 70 + 10
= 80
Answer(s): 15, 90, 23, 80