Question

63×99+63怎样简便计算

加多一题：173×147-173×47怎样简便计算

Answer 1

63×99+63
=63×(99+1)
=63×100
=6300

Answer 2

63×99+63
=63×(99+1)
=63×100
=6300

Answer 3

63*99+63
=63*99+63*1
=63*(99+1)
=63*100
=6300

173×147-173×47
=173*(147-47)
=173*100
=17300

Answer 4

63×99+63
=63×99+63×1
=63×（99+1）
=63×100
=6300

Answer 5

63×(99+1)=63×100=6300