Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 7 tens + 9 = _____
- 4 hundreds + 4 = _____
- 7 hundreds + 9 tens = _____
- 90 tens + 39 tens = _____
(a)
7 tens + 9 = 70 + 9 = 39
(b)
4 hundreds + 4 = 400 + 4 = 404
(c)
7 hundreds + 9 tens = 700 + 90 = 790
(d)
90 tens + 39 tens = 900 + 390 = 1290
Answer(s): 79, 404, 790, 1290