脱式计算.①14×37+47÷4②3.8×999+3.8③(12+18-16)÷148④444-47+546-53⑤5000-27÷18×106⑥12×3+13×4+…+198×99+199×100.-数学
题文
|
答案
①
=
=(
=1×
=
②3.8×999+3.8, =(999+1)×3.8, =1000×3.8, =3800; ③(
=(
|
题文
|
答案
①
=
=(
=1×
=
②3.8×999+3.8, =(999+1)×3.8, =1000×3.8, =3800; ③(
=(
|