40: ? >7
36: ? <5</p>
10=16:4+?
20=9*8-?
81: ?=9
? *8=64
40: ? >7 = 5 36: ? <5 =8<br>10=16:4+? =6 20=9*8-? = 52 81: ?=9 =9 ? *8=64 =8