计算下列各题.能简算的要简算. (1) (2)90.5×99+90.5 (3) (4)

小学数学题库 2025-08-29 00:33:19
计算下列各题,能简算的要简算。
(1)(2)90.5×99+90.5
(3)(4)
(1)
=
=7+1
=8
(2)90.5×99+90.5
=90.5×100
=9050
(3)
=120÷(45×
=120÷5
=24
(4)
=12×+12×-12×
=4+6-3
=7