Question

Answer 1

B2:

a, \(23-70-23+70+6=23\times\left(70-70\right)+6=23\times0+6=6\)

b, \(334-\left(45+334\right)-55=334-45-334-55=-100\)

B3:

a, \(\left(45-34\right)+\left(34-10\right)+5=45-34+34-10+5=40\)

b, \(\left(56-30\right)-\left(56+30\right)-40=56-30-56-30-40=-100\)

Answer 2

Bài 3: 

a: =45-34+34-10+5=50-10=40

b: =56-30-56-30-40=-60-40=-100