Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 6319 = 6000 + _______ + 10
- 6511 = 500 + _______ + 10
- 90 - 6 x 6 = _______
- 20 + 10 ÷ 10 = _______
(a)
6319 = 6000 + _______ + 10
6000 + 10 = 6010
6319 - 6010 = 309
(b)
6511 = 500 + _____ + 10
500 + 10 = 510
6511 - 510 = 6001
(c)
90 - 6 x 6
= 90 - 36
= 54
(d)
20 + 10 ÷ 10
= 20 + 1
= 21
Answer(s): 309, 6001, 54, 21