Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 87 ones = _____
- 8 tens = _____
- 2 tens 7 ones = _____
- 2 tens 10 ones = _____
(a)
87 ones
= 87 x 1
= 87
(b)
8 tens
= 8 x 10
= 80
(c)
2 tens 7 ones
= 2 x 10 + 7 x 1
= 20 + 7
= 27
(d)
2 tens 10 ones
= 2 x 10 + 10 x 1
= 20 + 10
= 30
Answer(s): 87, 80, 27, 30