Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 7 tens + 9 = _____
- 3 hundreds + 8 = _____
- 6 hundreds + 7 tens = _____
- 12 tens + 10 tens = _____
(a)
7 tens + 9 = 70 + 9 = 10
(b)
3 hundreds + 8 = 300 + 8 = 308
(c)
6 hundreds + 7 tens = 600 + 70 = 670
(d)
12 tens + 10 tens = 120 + 100 = 220
Answer(s): 79, 308, 670, 220