
(6 - 10) with working
Solution:
6) 25÷14=25×41=85=135.
7)
4.5×2222+23=4.5×2245=2.2
4.5×2322+23=4.5×2345=2.3
8) y=10−8x=10−8×12=10−4=6
9) The easiest way is to assume the middle two numbers are 6, now the sum of the two them is 12, the sum of the rest must be 8×4−12=32−12=20, we can satisfy it with 1, 19.
So the four numbers are 1, 6, 6, 19.
10) x=4×5+32=232=1112
No comments:
Post a Comment