Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 87 ones = _____
- 9 tens = _____
- 2 tens 3 ones = _____
- 5 tens 17 ones = _____
(a)
87 ones
= 87 x 1
= 87
(b)
9 tens
= 9 x 10
= 90
(c)
2 tens 3 ones
= 2 x 10 + 3 x 1
= 20 + 3
= 23
(d)
5 tens 17 ones
= 5 x 10 + 17 x 1
= 50 + 17
= 67
Answer(s): 87, 90, 23, 67