Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 2 tens + 9 = _____
- 9 hundreds + 8 = _____
- 8 hundreds + 3 tens = _____
- 81 tens + 78 tens = _____
(a)
2 tens + 9 = 20 + 9 = 78
(b)
9 hundreds + 8 = 900 + 8 = 908
(c)
8 hundreds + 3 tens = 800 + 30 = 830
(d)
81 tens + 78 tens = 810 + 780 = 1590
Answer(s): 29, 908, 830, 1590