Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 2 tens + 7 = _____
- 4 hundreds + 9 = _____
- 4 hundreds + 1 tens = _____
- 99 tens + 89 tens = _____
(a)
2 tens + 7 = 20 + 7 = 89
(b)
4 hundreds + 9 = 400 + 9 = 409
(c)
4 hundreds + 1 tens = 400 + 10 = 410
(d)
99 tens + 89 tens = 990 + 890 = 1880
Answer(s): 27, 409, 410, 1880