Recursive equation calculation in the fourth grade of primary school (if you can calculate skillfully) is urgent!
Question 1: Method 1: (125× 8 )× 25+125× (40× 25).
= 1000 ×25+ 125× 1000
= 150000
Method 2: 125×48×25
=( 125×8)×(6×25)
= 1000× 150
= 150000
Question 2: 45× (38+11)+49× 55.
=49×(45+55)
=49× 100
=4900